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': 'Sarcomere is present between \nSelect and explain. \nA. 2 successive z lines, B. 2 m lines, C. Both, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Sarcomere is functional unit of the muscle It is present between 2 successive z lines Ref:Guyton and Hall textbook of medical physiology 12th edition,page number: 86,87,', 'role': 'assistant'}]