Task: Question Answering
Input (English): Question: If 9 is a factor of 2a, then which of the following may not be an integer?

 Option A: 6a/54 + 2a/3

 Option B: (4a-18

 Option C: (2a+27

 Option D: (81-4a^2

 Option E: (2a-3
Output (English): Option A