This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other disorders of bone, Subject name: Pediatrics
[{'content': 'Juvenile idiopathic ahritis includes all the following categories EXCEPT: \nSelect and explain. \nA. Psoriatic ahritis, B. Enthesitis related ahritis, C. Systemic ahritis, D. Reactive ahritis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Juvenile Idiopathic Ahritis includes : Systemic JIA- Systemic involvement seen Oligoaicular- Affects four or fewer joints, often the knee or ankle. Polyaicular ahritis, rheumatoid factor negative Polyaicular ahritis, rheumatoid factor positive Psoriatic ahritis Enthesitis-related ahritis Undifferentiated ahritis', 'role': 'assistant'}]