This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
[{'content': 'The characteristic cell of granulomatous reaction is: \nSelect and explain. \nA. Plasma cell, B. Epithelioid cell, C. Lymphocyte, D. Eosinophil', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Characteristic features of granulomatous reaction/inflammation\na) Epithelioid cells (modified macrophages)\nb) Giant cells (Langhans, foreign body)\nc) Necrosis (caseation)\nd) Fibrosis', 'role': 'assistant'}]