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: Answer is A (Chest pain is the most common symptom): `Dyspnea is the most frequent symptom of PE and tachypnea is the most frequent sign'-Harrison 16th/1561 Chest pain is due to pulmonary infarction and usually indicates a small PE located distally near the pleura.", 'role': 'assistant'}]