GK: The milk of which animal is sold for seven thousand rupees per liter?

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Question 1: The milk of which animal is sold up to seven thousand rupees per liter? Don't know many people
Answer: Donkey 

Question 2: Which is the most expensive mineral in the world?
Answer: Uranium
Question 3: By whom was English education started in India?
Answer: Lord Macaulay 

Question 4: Which is the largest saltwater lake in the world?
Answer: Caspian Sea
Question 5: Which is the largest freshwater lake in India?
Answer: Wular Lake