Q. Consider the following countries:
  1. China
  2. Thailand
  3. Vietnam
  4. Laos
The Mekong River passes through which of the above countries?

Answer: 1, 2, 3 and 4
Notes: The Mekong River originates in China and flows through several Southeast Asian countries, including Laos, Thailand, and Vietnam, before emptying into the South China Sea. Therefore, all four countries listed—China, Thailand, Vietnam, and Laos—are traversed by the Mekong River.
Question Source: 📚This question has been sourced from GKToday's Target UPSC Prelims for 2026, 2027 & 2028 App Exclusive Course in GKToday Android Application which provides more than 12K Topicwise UPSC Prelims General Studies questions with explanations framed on UPSC pattern. Download the app here.
📌 Question Number: 89 in 52: World Continents and Countries in the above course in App.