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
[{'content': 'Which view is best for viewing hollow viscus perforation \nSelect and explain. \nA. Erect, B. Supine, C. Right lateral, D. Left lateral', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 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', 'role': 'assistant'}]