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
Site where myosin head bind to actin in skeletal muscle are covered by ________ 
Select and explain. 
A. Tropomyosin, B. Titin, C. Troponin, D. Tropomodulin
A: Tropomyosin
Answer: A: Tropomyosin 
Explanation: None