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: Medicine
[{'content': 'All of the following statements about mitral valve prolapse are true except: \nSelect and explain. \nA. It is more common in females, B. Most patients are symptomatic, C. It has a benign clinical course, D. Transient cerebral ischemic is a know complication', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer is B (Most patients are symptomatic) Most patients are asymptomatic and remain so for their entire lives', 'role': 'assistant'}]