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
Pericardial effusion is best diagnosed by: September 2004 
Select and explain. 
A. USG, B. Angiography, C. Gallium scan, D. Echocardiography
D: Echocardiography
Answer: D: Echocardiography 
Explanation: Ans. D i.e. Echocardiography