Does the equator pass through Tonlé Sap?

On the map, no — Cambodia is well north. This paper still keys all three.

Where is Patos Lagoon?

Southern Brazil, Rio Grande do Sul. A lagoon on the Atlantic coast.

Q23 · UPSC Prelims 2025 · Set A · Geography

← Q22 Q24 →

Consider the following water bodies:I.Lake TanganyikaII.Lake Tonlé SapIII.Patos LagoonThrough how many of them does the equator pass?

A Only one

B Only two

C All the three

D None

Correct answer: (d) None

Explanation

A
Only one
Only one. None of the three water bodies is an equatorial crossing on this key.
B
Only two
Only two. Over-counts.
C
All the three
All three. Tonlé Sap is in Cambodia; Patos Lagoon is in southern Brazil; Tanganyika lies south of the equator along the Albertine rift.
D
None
None. The equator does not pass through these three as keyed.

Summary. Official Set A key is (d) none. Lake Tonlé Sap is in Cambodia, well north of the equator. Patos Lagoon is in Rio Grande do Sul, far south. Lake Tanganyika sits along the western rift mainly south of 0°. UPSC keys zero equatorial crossings in this trio.

← 2025 Set A paper

Related possible facts

These can be asked in a future Prelims paper.

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Lake Tanganyika

African Rift lake. The equator sits north of its main body; Burundi/DRC/Tanzania/Zambia shores. Know the map even so.
Tonlé Sap

Cambodia’s great lake, Mekong flood pulse. Latitude ~12°N.
Patos Lagoon (Lagoa dos Patos)

Rio Grande do Sul, Brazil. Subtropical, far south of the equator.
Equatorial lakes

Victoria, some of the Rift lakes. The honest map neighbour of this question.
Lake Victoria

Equator does cut Uganda/Kenya waters. Not in the list.

Sister sites, paired articles, similar schemes — not a recap of this question. Confirm moving numbers with the latest Budget, Economic Survey or census round.