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': 'Which of the following is a major criteria for diagnosis of Rheumatic fever (RF) according to modified Jones criteria \nSelect and explain. \nA. Subcutaneous nodules, B. Past history of Rheumatic fever, C. Fever, D. ASO titre', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Jones major criteria of RHD include card it is,chorea,arthritis, subcutaneous nodule, erythema marginatum', 'role': 'assistant'}]