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': 'Which of the proteins connect Z lines to M lines? \nSelect and explain. \nA. Nebulin, B. Actin, C. Myosin, D. Titin', 'role': 'user'}, {'content': 'Answer: D \nExplanation: It is the largest protein.\nIt binds Z lines to M lines\nIt prevents overstretching of sarcomere', 'role': 'assistant'}]