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.

Problem: a and b invests rs. 10000 each, a investing for 6 months and b investing for all the 12 months in the year. if the total profit at the end of the year is rs. 24000, find their shares ?
Options: a. 8000, 16000, b. 1599,2000, c. 7290,3000, d. 15000,4000, e. 72821,5000
a