This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Epitheliod granuloma is caused by \nSelect and explain. \nA. Neutrophils, B. Cytotoxic T cells, C. Helper T cells, D. NK cells', 'role': 'user'}, {'content': 'Answer: C \nExplanation: ref Robbins 7/e p 83 CD 4 hepler cells are involved in granuloma formation as it secreted lFN - gamma, IL 2 ,IL 12 Histiocytes (specifically macrophages) are the cells that define a granuloma. They often, but not invariably, fuse to form multinucleated giant cells (Langhans giant cell). The macrophages in granulomas are often referred to as "epithelioid".', 'role': 'assistant'}]