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': 'Ciliary movement rate of nasal mucosa is - \nSelect and explain. \nA. 1-2 mm/min, B. 2-5 mm/min, C. 5-10 mm/min, D. 10-12 mm/min', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]