Task: Question Answering
Input (English): Question: Adam can do a job in 15days, John can do the same job in 20days. If they work together for 4days on this job. What fractionof job is incomplete ?

 Option A: 3/11

 Option B: 4/11

 Option C: 13/13

 Option D: 8/15

 Option E: 9/11
Output (English): Option D