This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Musculoskeletal  disorders, Subject name: Pediatrics
[{'content': 'All of the following are seen in Systemic Juvenile Ahritis except \nSelect and explain. \nA. Rheumatoid Factor +ve, B. Hepatosplenomegaly, C. High fever with rash, D. Elevated E.S.R', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Rheumatoid factor is negative in systemic onset JIA Ref Ghai pediatrics eighth edition pg no 626', 'role': 'assistant'}]