Task: Question Answering
Input (English): Question: A cistern which could be filled in 9 hours takes one hour more to be filled owing to a leak in its bottom. If the cistern is full in what time will the leak empty it?

 Option A: 76 hrs

 Option B: 99 hrs

 Option C: 55 hrs

 Option D: 90 hrs

 Option E: 11 hrs
Output (English): Option D