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 the statements are seen in fragile X syndrome except \nSelect and explain. \nA. Cardiac murmurs, B. Female preponderance, C. Autism, D. Mental retardation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]