UPSC Prelims 2026 · GS Paper 1 · Question 40

Which of the following statements with reference to Lake Turkana is/are correct ? 1. It is the largest desert lake in the world. 2. The lake is situated in South Sudan along the eastern fringe of the Sahara desert. 3. The lake is listed as a UNESCO World Heritage Site and is also referred to as the 'Jade Sea'. Select the answer using the code given below :

Correct answer: Option B

Geography

Options

  • (a) 1 only
  • (b) 1 and 3 only
  • (c) 2 and 3 only
  • (d) 1, 2 and 3

Detailed solution

Answer

Option (B) — Statements 1 and 3 are correct

Explanation
  • Lake Turkana is an endorheic alkaline lake located in the Kenyan Rift Valley, with its far northern end extending into Ethiopia.
  • It is the world's largest permanent desert lake and the largest alkaline lake, fed mainly by the Omo, Turkwel, and Kerio rivers.
  • Its waters appear turquoise due to algae, earning it the nickname 'Jade Sea', and the Lake Turkana National Parks were inscribed as a UNESCO World Heritage Site.
  • The Turkana Basin is also famous as the 'Cradle of Mankind' for its rich hominid fossil discoveries.
Statement Analysis
  • Statement 1. It is the largest desert lake in the world: Correct. Lake Turkana is recognized as the world's largest permanent desert lake.
  • Statement 2. The lake is situated in South Sudan along the eastern fringe of the Sahara desert: Incorrect. The lake lies mainly in Kenya, with its northern tip in Ethiopia, not in South Sudan or near the Sahara.
  • Statement 3. The lake is listed as a UNESCO World Heritage Site and is also referred to as the 'Jade Sea': Correct. Lake Turkana National Parks are a UNESCO site, and its jade-green colour gives it the name 'Jade Sea'.
    UPSC Prelims 2026 GS Paper 1 Q40 Answer & Solution | ThinQ IAS