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': 'Extrafiisal fibre innervated by \nSelect and explain. \nA. Ia, B. lb, C. Aa, D. Ass', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Extrafusal fibers are innervate by A-alfa motor neurons They are myelinated and fast conducting Ref:Guyton and Hall textbook of medical physiology 12th edition,page number:769,770,771', 'role': 'assistant'}]