Task: Question Answering
Input (English): Question: A person can swim in still water at 12 km/h. If the speed of water 6 km/h, how many hours will the man take to swim back against the current for 6km?

 Option A: 3

 Option B: 4

 Option C: 5

 Option D: 6

 Option E: 7
Output (English): Option D