Task: Question Answering
Input (English): Question: A man swims downstream 72 km and upstream 45 km taking 9 hours each time; what is the speed of the current ?

 Option A: 2.5 kmph

 Option B: 6.5 kmph

 Option C: 1.5 kmph

 Option D: 8.5 kmph

 Option E: 1.7 kmph
Output (English): Option C