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: Medicine
[{'content': "Frecieuncy of Rest tremor in Parkinson's disease is - \nSelect and explain. \nA. 2/sec, B. 14/sec, C. 4-6/sec, D. 8/sec", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]