Task: Question Answering
Input (English): Question: Which of the following is an integer?
I. 13! / 6!
II. 13! / 8!
III. 13! / 7!5!

 Option A: I only

 Option B: II only

 Option C: III only

 Option D: I and II only

 Option E: I, II and III
Output (English): Option E