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: A i.e. USG Earliest detection Investigation Ascites USGQ Pericardial effusion EchocardiographyQ Bronchiectasis CT-ScanQ Fetal life DopplerQ Pleural effusion IA lateral decubitus viewQ Pneumoperitonum Erect chest X-ray or left lateral decubitus abdominal X-rayQ