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': 'The most common cause of Pulmonary thromboembolism \nSelect and explain. \nA. DIC, B. DVT, C. Coagulaon Disorder, D. Venous Hypertension', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The most common cause of pulmonary thromboembolism is deep venous thrombosis.', 'role': 'assistant'}]