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': 'What is the position of vegetation on hea valve caused due to non bacterial thrombotic endocarditis? \nSelect and explain. \nA. Pocket of valves, B. Upper surface of cusps, C. Lower surface of cusps, D. Along the line of closure', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Answer- D. Along the line of closureIn NBTE, vegetations occur along the line of closure.', 'role': 'assistant'}]