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: Pathology
[{'content': "Mazabraud's syndrome is: \nSelect and explain. \nA. Fibrous dysplasia + cafe au lait spots., B. Fibrous dysplasia + intramuscular myxoma., C. Fibrous dysplasia + peripheral neuritis., D. None.", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]