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': "Kartagener's syndrome-Characteristic is - \nSelect and explain. \nA. Absence of cilia, B. Cilia undeveloped, C. Ultra structural abnormality of cilia, D. None of the above", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]