This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System, Subject name: Physiology
[{'content': 'Cerebellum functions include \nSelect and explain. \nA. Posture and balance, B. Memory and speech, C. Involuntary sphincters, D. Voluntary movement in the lower half of body', 'role': 'user'}, {'content': 'Answer: A \nExplanation: (A) Posture and balance', 'role': 'assistant'}]