Task: Question Answering
Input (English): Question: A, B two inlet pipes takes 15,18 minutes to fill the tank and C an oulet pipe takes 45 minutes to empty the tank respectively. In what time the tank be filled if all of them are operated together?

 Option A: 11 minutes

 Option B: 10 minutes

 Option C: 12 minutes

 Option D: 13 minutes

 Option E: 14 minutes
Output (English): Option B