Task: Question Answering
Input (English): Question: Pipes A and B can fill a tank in 4 and 6 hours. Pipe C can empty it in 8 hours. If all pipes are opened together, then the tank will be filled in?

 Option A: 60/17 hr

 Option B: 22/7 hr

 Option C: 52/11 hr

 Option D: 6 hr

 Option E: 63/19 hr
Output (English): Option B