Task: Question Answering
Input (English): Question: The C.P of 10 pens is equal to the S.P of 12 pens. Find his gain % or loss%?

 Option A: 6 2/5%

 Option B: 6 2/7%

 Option C: 6 2/3%

 Option D: 6 5/3%

 Option E: 6 7/3%
Output (English): Option C