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

34 - 12
43 - 30
52 - 21
62 - 19

The answer is D. 62 – 19.

In each of the other options, the difference between the two numbers is 12. This is because each of the other numbers is a multiple of 12, plus or minus 1. For example, 34 is 12 * 2 + 2, 43 is 12 * 3 + 7, and 52 is 12 * 4 + 6. However, 62 is not a multiple of 12, so the difference between 62 and 19 is not 12.