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': 'Myosin and actin filaments are kept in place by \nSelect and explain. \nA. Tropomyosin, B. Troponin, C. Actinin, D. Titin', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Titin keeps actin and myosin in place It povides elasticity It is present in skeletal and cardic muscles Ref:Guyton and Hall textbook of medical physiology 12th edition ,pag number:85,86,87', 'role': 'assistant'}]