Task: Question Answering
Input (English): Question: find the number of 6 digit numbers that can be formed using digits 1,2,3,4,5,6 once such that the 6digit number is divisible by its unit digit.

 Option A: 648

 Option B: 649

 Option C: 650

 Option D: 651

 Option E: 652
Output (English): Option A