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': 'Minimal pleural effusion is best viewed in which position \nSelect and explain. \nA. Lateral decubitus, B. Full inspiration erect, C. Supine, D. Full expiration erect', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Lateral decubitus', 'role': 'assistant'}]