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