With reference to Turkana Lake, which of the following statements is/are correct ? 1. It is the world's largest desert lake. 2. The lake lies along the eastern edge of the Sahara Desert in South Sudan. 3. The lake is listed as a UNESCO World Heritage Site and is also known as the 'Jade Sea'.

Lake Turkana is the world's largest permanent desert lake and the world's largest alkaline lake — Statement 1 is correct. Statement 2 is incorrect: Lake Turkana is located in the Kenyan Rift Valley, with its northernmost tip extending into Ethiopia, not in South Sudan, and it lies along the Great Rift Valley, not the Sahara Desert. Statement 3 is correct: Lake Turkana National Parks are inscribed as a UNESCO World Heritage Site, and the lake is famously known as the 'Jade Sea' due to its striking turquoise-green colour caused by algae.