Task: Question Answering
Input (English): Question: A 70 kg metal bar made of alloy of tin and silver lost 7 kg of its weight in the water. 10 kg of tin loses 1.375 kg in the water; 5 kg of silver loses 0.375 kg. What is the ratio of tin to silver in the bar?

 Option A: 1/4

 Option B: 2/5

 Option C: 1/2

 Option D: 3/5

 Option E: 2/3
Output (English): Option E