Okay that’s fine but I’m bout to go get back

Answer
Correct answer is B
Explanation
A should be 2, and B should be 12. There are 12 carbons on the left and 6 carbons on the right, so put 2 infront of A. There are 36 on the left, so be should be 12 so that when you add 24 + 12 = 36 on your right hand side