Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.
Q: Problem: two whole numbers whose sum is 100 can not be in the ratio
Options: a. 2: 23, b. 5: 45, c. 10: 10, d. 2: 6, e. 2: 3
A:
d