Task: Question Answering
Input (English): Question: A boat moves down stream at the rate of 1 km in 6 minutes and
upstream at the rate of 1 km in 10 minutes. The speed of current is

 Option A: 2 kmph

 Option B: 3 kmph

 Option C: 4 kmph

 Option D: 5 kmph

 Option E: 6 kmph
Output (English): Option A