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: ENT
[{'content': "Most common cause of facial palsy - \nSelect and explain. \nA. Post operative, B. Trauma, C. Ramsay hunt syndrome, D. Bell's palsy", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]