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
The most common presentation of radiation carditis is: 
Select and explain. 
A. Pericardial effusion, B. Atheromatous plaques, C. Myocardial fibrosis, D. Pyogenic pericarditis
A: Pericardial effusion
Answer: A: Pericardial effusion 
Explanation: Ans. Pericardial effusion