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
All of the following are seen in Systemic Juvenile Ahritis except 
Select and explain. 
A. Rheumatoid Factor +ve, B. Hepatosplenomegaly, C. High fever with rash, D. Elevated E.S.R
A: Rheumatoid Factor +ve
Answer: A: Rheumatoid Factor +ve 
Explanation: Rheumatoid factor is negative in systemic onset JIA Ref Ghai pediatrics eighth edition pg no 626