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
Minimal ascites can be best detected by – 
Select and explain. 
A. USG, B. Plain X-ray abdomen, C. MRI, D. CT scan
A: USG
Answer: A: USG 
Explanation: Minimal ascites is detected best by USG.