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
Best position for chest X-ray to detect left pleural effusion is: 
Select and explain. 
A. Left lateral, B. Supine, C. Left lateral decubitus, D. Right lateral decubitus
C: Left lateral decubitus
Answer: C: Left lateral decubitus 
Explanation: Ans. Left lateral decubitus