Task: Question Answering
Input (English): Question: Every student in a room is either a junior or a senior. There is at least one junior and at least one senior in the room. If 4/5 of the juniors is equal to 1/2 of the seniors, what fraction of the students in the room are juniors?

 Option A: 13/20

 Option B: 11/3

 Option C: 5/13

 Option D: 12/17

 Option E: 17/20
Output (English): Option C