Find the odd number / letters / word from the given alternative:

The answer is C. 85 – 60.

In each of the other options, the difference between the two numbers is 27. This is because each of the numbers is a multiple of 3, and 27 is the product of 3 and 9. However, 85 is not a multiple of 3, so the difference between 85 and 60 is not 27.