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': "The most common cause of lower motor neuron facial palsy is - \nSelect and explain. \nA. Cholesteatoma, B. Cerebello-pontine angle tumors, C. Bell's palsy, D. Postoperative (ear surgery)", 'role': 'user'}, {'content': "Answer: C \nExplanation: The commonest cause of facial palsy is idiopathic or Bell's palsy, which is a LMN type of palsy.", 'role': 'assistant'}]