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
A child with 15days cough examination shows cervical lymphadenopathy Lymphnode biopsy shows langerhans giant cells 
Select and explain. 
A. leprosy, B. ubosculosis, C. Sarcoidosis, D. syphilis
B: ubosculosis
Answer: B: ubosculosis 
Explanation: ref : robbins 10th ed