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': 'True about vegetation in rheumatic fever is - \nSelect and explain. \nA. Soft & friable, B. Large & firm, C. Soft & firm, D. Large & friable', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]