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
[{'content': "Tropomyosin : \nSelect and explain. \nA. Helps in the fusion of actin and myosin, B. Covers myosin and prevents attachments of actin ad myosin, C. Slides over myosin, D. Causes Cat' release", 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Covers myosin and prevents attachment of actin and myosin', 'role': 'assistant'}]