This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdominal Radiography, 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: Ans. is 'a' i.e. . USG . For clinical detection of ascites, a minimal amount of 500 ml of peritoneal fluid is required. Lesser amounts can be easily detected on USG IOC for minimal ascites -USG IOC for minimal Pleural Effusion-USG