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: Radiology
Tear drop heart is seen in 
Select and explain. 
A. Pulmonary Vein obstruction, B. Mitral incompetence, C. Chronic emphysema, D. Constrictive pericarditis
C: Chronic emphysema
Answer: C: Chronic emphysema 
Explanation: Tear drop heart - Chronic emphysema.
Pentagon shaped heart - Mitral incompetence.