This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S., Subject name: Pediatrics
[{'content': "Langerhans cell shows which of these? \nSelect and explain. \nA. Badminton racquet appearance, B. CD100a, C. MPO +, D. Birbeck's granules", 'role': 'user'}, {'content': "Answer: D \nExplanation: d. Birbeck's granules(Ref: Nelson's 20/e p 2484-2489; Ghai 8/e p 620-623)Tennis racquet and not badminton racquet appearance is seen in EM of LCH; LCH is positive for CD1a and S100.", 'role': 'assistant'}]