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
[{'content': '25 year old patient Suspected to have a pneumoperitoneum. Patient is unable to stand. Best x-ray view is \nSelect and explain. \nA. Left lateral decubitus view, B. Right lateral decubitus view, C. Supine, D. Prone', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Left lateral decubitus view demonstrates\xa0the air between dense shadow of liver and the abdominal wall.', 'role': 'assistant'}]