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': "Which of the folloeing true about libman sac's endocarditis \nSelect and explain. \nA. It is along the line of closure, B. On either side of valve, C. It is friable, D. Organism are seen", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., On either side of valve", 'role': 'assistant'}]