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': "Content ofAschoff's nodules are A/E - \nSelect and explain. \nA. Histiocytes, B. Langhan's giant cell, C. Fibrinoid deposition, D. Aschoff's cells", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Langhans giant cell", 'role': 'assistant'}]