This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'The protein responsible for elasticity of the muscle is: \nSelect and explain. \nA. Actin, B. Myosin, C. Titin, D. All', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Titin is responsible for the elasticity of the muscle present in hea and skeletal muscle Actin and myosin are regarded as contractile proteins Ref:Guyton and Hall textbook of medical physiology 12th edition,page number:86,87', 'role': 'assistant'}]