Which one of the following pairs is correctly matched?

Updated 11 Apr 2026

Contents18
UPSC Prelims GS2013Geography

Which one of the following pairs is correctly matched?

Geographical Feature Region
(a) Abyssinian Plateau Arabia
(b) Atlas Mountains North-Western Africa
(c) Guiana Highlands South-Western Africa
(d) Okavango Basin Patagonia
  1. AAbyssinian Plateau Arabia
  2. BAtlas Mountains North-Western Africa
  3. CGuiana Highlands South-Western Africa
  4. DOkavango Basin Patagonia
Show answer

Answer: (B) Atlas Mountains North-Western Africa

Check each pair against a standard atlas:

(a) Abyssinian Plateau — this is in East Africa (Ethiopia), NOT in Arabia. Wrong match.

(b) Atlas Mountains — these are located in North-Western Africa, stretching across Morocco, Algeria, and Tunisia. Correct match.

(c) Guiana Highlands — these are in South America (Venezuela, Guyana, Suriname, Brazil), NOT in South-Western Africa. Wrong match.

(d) Okavango Basin — this is in Southern Africa (mainly Botswana), NOT in Patagonia (which is in South America — southern Argentina/Chile). Wrong match.

So only option (b) is correctly matched.

Why this was asked

The Atlas Mountains form the backbone of North-Western Africa, extending across Morocco, Algeria, and Tunisia as a major mountain system separating the Mediterranean coast from the Sahara Desert.

UPSC uses well-known geographical features placed in wrong continents or regions to test whether students rely on memorized facts versus actual spatial understanding of world geography.

Atlas Mountains North-Western Africa

Geography Atlas Mountains North-Western Africa

Atlas Mountains: North-Western Africa's Major Range

Must know

Atlas Mountains stretch across Morocco, Algeria, and Tunisia in North-Western Africa

Separates Mediterranean coast from Sahara Desert

Good to know

Extend approximately 2,500 km from Atlantic coast to Tunisia

Highest peak: Mount Toubkal in Morocco at 4,167m

Geographic Context

The Atlas Mountains form North-Western Africa's most prominent mountain system, acting as a natural barrier between the Mediterranean coastal regions and the vast Sahara Desert to the south.

Atlas Mountain Ranges

Range

Location

Countries

Key Features

High Atlas

Central Morocco

Morocco

Highest range, includes Mount Toubkal

Middle Atlas

Northern Morocco

Morocco

Plateau-like, rich in cedar forests

Anti-Atlas

Southern Morocco

Morocco

Older geological formation

Tell Atlas

Northern Algeria

Algeria, Tunisia

Coastal range, Mediterranean climate

Saharan Atlas

Southern Algeria

Algeria

Transitions into Sahara Desert

Atlas Mountains Location

The Atlas Mountains span 2,500 km across North-Western Africa, clearly separating Mediterranean coast from Sahara
The Atlas Mountains span 2,500 km across North-Western Africa, clearly separating Mediterranean coast from Sahara

Source: Britannica — Atlas Mountains | Physical Features & People | Britannica · www.britannica.com

Exam traps

Option (b) was the only correct match - Atlas Mountains are indeed in North-Western Africa

UPSC tests precise geographic locations - know major mountain ranges by their exact regions

Abyssinian Plateau East Africa

Geography Abyssinian Plateau Arabia

Abyssinian Plateau: East Africa's Highland Region

Must know

Abyssinian Plateau is located in East Africa, primarily in Ethiopia

Also called Ethiopian Highlands - NOT in Arabia

Good to know

Average elevation 2,000-3,000m above sea level

Formed by volcanic activity and tectonic uplift

Geographic Location

The Abyssinian Plateau, also known as the Ethiopian Highlands, is located in East Africa - primarily in Ethiopia. It forms part of the Horn of Africa region, NOT the Arabian Peninsula.

Key Geographic Features

Covers most of Ethiopia and parts of Eritrea

Divided by the Great Rift Valley into two sections

Source of the Blue Nile river

Contains Simien Mountains and Bale Mountains

Climate is temperate due to high altitude despite tropical latitude

East Africa Location

The Abyssinian Plateau is clearly in East Africa, not Arabia - a common UPSC trap
The Abyssinian Plateau is clearly in East Africa, not Arabia - a common UPSC trap

Source: Britannica — Ethiopia | Dams, GERD, Religion, Language, Currency, Map ... · www.britannica.com

Exam traps

Trap: Option (a) placed Abyssinian Plateau in Arabia - it's actually in East Africa (Ethiopia)

Don't confuse Ethiopian Highlands with Arabian Peninsula - completely different regions

Remember: Abyssinia is the old name for Ethiopia in East Africa

Guiana Highlands South America

Geography Guiana Highlands South-Western Africa

Guiana Highlands: South America's Ancient Shield

Must know

Guiana Highlands are in South America - Venezuela, Guyana, Suriname, northern Brazil

NOT in South-Western Africa - that's the UPSC trap

Good to know

Famous for Angel Falls (world's highest waterfall) in Venezuela

Contains unique tepuis (table mountains) with endemic species

Geographic Location

The Guiana Highlands are located in northern South America, spanning Venezuela, Guyana, Suriname, and northern Brazil. They are part of the ancient Guiana Shield - NOT in Africa.

Guiana Highlands Distribution

Country

Highland Name

Key Features

Venezuela

Venezuelan Guiana

Angel Falls, Mount Roraima, tepuis

Guyana

Guyana Highlands

Kaieteur Falls, Pakaraima Mountains

Suriname

Suriname Highlands

Juliana Top (highest peak)

Brazil

Guiana Shield

Northern Amazon Basin margin

Unique Features

Tepuis: Flat-topped mountains with vertical walls and unique ecosystems

Precambrian rocks: Among Earth's oldest geological formations

High endemism: Many species found nowhere else on Earth

Waterfalls: Multiple spectacular falls including Angel Falls (979m)

Biodiversity hotspot: Pristine rainforest ecosystems

South America Location

Guiana Highlands span northern South America - the question incorrectly placed them in South-Western Africa
Guiana Highlands span northern South America - the question incorrectly placed them in South-Western Africa

Source: Britannica — Guiana Highlands | tropical rainforest, tepuis, savannas | Britannica · www.britannica.com

Exam traps

Trap: Option (c) placed Guiana Highlands in South-Western Africa - they're in South America

Don't confuse Guiana (South America) with Guinea (West Africa) - different continents

Remember: Angel Falls is in Venezuelan Guiana, not Africa

Okavango Basin Southern Africa

Geography Okavango Basin Patagonia

Okavango Basin: Southern Africa's Inland Delta

Must know

Okavango Basin is in Southern Africa, primarily in Botswana

NOT in Patagonia (which is in southern South America)

Forms world's largest inland delta in the Kalahari Desert

Good to know

UNESCO World Heritage Site and biodiversity hotspot

Geographic Context

The Okavango Basin encompasses the drainage area of the Okavango River system in Southern Africa. It creates the famous Okavango Delta in Botswana - the world's largest inland delta system.

Okavango System

Component

Location

Countries

Significance

Okavango River

Flows southeast

Angola, Namibia, Botswana

Source in Angolan Highlands

Okavango Delta

Kalahari Desert

Botswana

World's largest inland delta

Okavango Basin

Entire drainage

Angola, Namibia, Botswana

Supports vast wildlife populations

Ecological Importance

Seasonal flooding: Annual floods from Angola create vast wetlands

Wildlife sanctuary: Supports elephants, hippos, crocodiles, 400+ bird species

Unique ecosystem: Desert oasis in the middle of Kalahari Desert

No outlet to sea: River ends in the delta, creating permanent swamps

Tourism hub: Major safari destination in Botswana

Southern Africa Location

The Okavango Basin is clearly in Southern Africa (Botswana), not Patagonia in South America
The Okavango Basin is clearly in Southern Africa (Botswana), not Patagonia in South America

Source: NASA Science — Okavango Swamp, Botswana - NASA Science · science.nasa.gov

Exam traps

Trap: Option (d) placed Okavango Basin in Patagonia - it's in Southern Africa (Botswana)

Patagonia is in southern Argentina/Chile, while Okavango is in Botswana - different continents

Remember: Okavango Delta = Botswana's famous inland delta in Kalahari Desert