This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
[{'content': 'A child with 15days cough examination shows cervical lymphadenopathy Lymphnode biopsy shows langerhans giant cells \nSelect and explain. \nA. leprosy, B. ubosculosis, C. Sarcoidosis, D. syphilis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: ref : robbins 10th ed', 'role': 'assistant'}]