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: Pediatrics
[{'content': 'Major criteria for diagnosis of rheumatic fever? \nSelect and explain. \nA. Erythema migrans, B. Ahralgia, C. Fever, D. Subcutaneous Nodule', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Subcutaneous Nodule", 'role': 'assistant'}]