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': 'Superior orbital fissure best view is: \nSelect and explain. \nA. Plain AP view, B. Caldwell, C. Townes, D. Basal view', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Caldwell', 'role': 'assistant'}]