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': 'Chronic passive congestion of the lungs is most often secondary to: \nSelect and explain. \nA. Malnutrition, B. Massive hemorrhage, C. Corpulmonale, D. Atherosclerotic heart disease', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]