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
Flask shaped heart is seen in – 
Select and explain. 
A. Ebstein anomaly, B. Pericardial effusion, C. TOF, D. TAPVC
B: Pericardial effusion
Answer: B: Pericardial effusion 
Explanation: With a large pericardial effusion the heart appears enlarged and globular in shape, the so-called "water - bottle" or "Flask - shaped" without pulmonary venous congestion.