Task: Question Answering
Input (English): Question: The average age of 36 students in a group is 14 years. When teacher's age is included to it, the average increases by one. What is the teacher's age in years ?

 Option A: 81 years

 Option B: 21 years

 Option C: 51 years

 Option D: 31 years

 Option E: 61 years
Output (English): Option C