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': "All of the following are true about Kaagener's syndrome, Except \nSelect and explain. \nA. Dextrocardia, B. Infeility, C. Mental retardation, D. Bronchiectasis", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Answer is C (Mental retardation):', 'role': 'assistant'}]