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
Triangular shaped heart is a radiological finding of 
Select and explain. 
A. Constrictive pericarditis, B. Mitral incompetence, C. TAPVC, D. Ebstein's anomaly
A: Constrictive pericarditis
Answer: A: Constrictive pericarditis 
Explanation: Triangular shaped heart - Constrictive Pericarditis.
Pentagon shaped heart - Mitral incompetence.