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': "Protein attached to 'Z' line in cardiac muscle, which is responsible for elasticity is \nSelect and explain. \nA. Troponin, B. Tropomyosin, C. Titin, D. Actin", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Titin is a macromolecule which extends between z-line and thick filament It is seen in skeletal muscloand cardiac muscles It provides elasticity Ref guyton and hall textbook of medical physiology 12/e p102', 'role': 'assistant'}]