Question

Select the sentence that means I love no one else but you.

A. Only I love you.
B. I only love you.
C. I love only you.

Answer 1

C. I love only you, because A and B would be wrong since it is saying only I love you, and nobody else does. 

Answer 2

C. I love only you.
A could mean that only I can love you but it doesn't explain that I don't love anyone else but you.
B and C sounds the same, but it's also different. So, your correct answer would be C.