Caffeine is 49.47% C, 5.19% H, 28.86% N, and 16.48% O. If the molecular mass of caffeine is 207 g mol, what is the molecular formula?

A. C4H5O (All of the numbers are subscript btw)

B. C8H10O2

C. C12H15O3

D. None of the Above

I put the answer is C. But there was nitrogen in the description of caffeine but the answers didn't have nitrogen in it. So i wasn't sure if he accidentally left it out or if it is a trick question or if nitrogen is always left out in the formula of caffeine. There are 25 questions on this test and a total of 100 points. This problem is the only one that's worth 8 points (all of the other ones are 4 a piece), that's why i figured that a college professor wouldn't be childish enough to put a trick question especially on a problem that's worth the most points.

Anyone know for SURE what the answer is?