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

The answer is D. 10 – 90.

In each of the other options, the difference between the two numbers is the product of the first number and the sum of the first and second numbers. For example, in A, the difference between 9 and 72 is 63, which is the product of 9 and 7. In B, the difference between 8 and 56 is 48, which is the product of 8 and 6. In C, the difference between 11 and 115 is 104, which is the product of 11 and 9. However, in D, the difference between 10 and 90 is 80, which is not the product of 10 and the sum of 10 and 9.