This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General physiology, Subject name: Physiology
[{'content': 'Which of the following is a Relaxation protein? \nSelect and explain. \nA. Actin, B. Myosin, C. Tropomyosin, D. Dystrophin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Tropomyosin molecules cover all the active site of actin molecule. It is located in the groove between the two chains of actin. (REF: TEXTBOOK OF MEDICAL PHYSIOLOGY GEETHA N 2 EDITION, PAGE NO - 40)', 'role': 'assistant'}]