This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
Which of troponin binds to tropomyosin to form troponin-tropomyosin complex? 
Select and explain. 
A. I, B. c, C. t, D. m
C: t
Answer: C: t 
Explanation: None