This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Surgery
Which view is best for viewing hollow viscus perforation 
Select and explain. 
A. Erect, B. Supine, C. Right lateral, D. Left lateral
A: Erect
Answer: A: Erect 
Explanation: The PA erect abdominal radiograph is often obtained in conjunction with the AP supine abdominal view in the acute abdominal series of radiographs. When used together it is a valuable projection in assessing air fluid levels, and free air in the abdominal cavity. Ref: Internet