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
Chronic passive congestion of the lungs is most often secondary to: 
Select and explain. 
A. Malnutrition, B. Massive hemorrhage, C. Corpulmonale, D. Atherosclerotic heart disease
C: Corpulmonale
Answer: C: Corpulmonale 
Explanation: None