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 are true about pulmonary embolism,except - \nSelect and explain. \nA. Chest pain is the most common symptom, B. Most commonly presents within 2 weeks, C. More is the survival time, more is the chance of . recovery, D. Arises from leg veins', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]