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': 'Oxidative capacity is high in which type of skeletal muscle fiber \nSelect and explain. \nA. Type I fiber, B. Type IIA fiber, C. Type IIB fiber, D. All of the above', 'role': 'user'}, {'content': "Answer: A \nExplanation: Oxidative capacity is high in type I fiber (slow-oxidative), moderate in type IIA (fast-oxidative-glycolytic), low in Type IIB fiber (fast-glycolytic).Reference: Ganong's review of Medical Physiology,25th ed, p 108", 'role': 'assistant'}]