This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nose and paranasal sinuses, Subject name: ENT
[{'content': 'caldwell view is done for: \nSelect and explain. \nA. Sphenoid sinus, B. Maxillary sinus, C. Ethmoid sinus, D. Frontal sinus', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Lateral view is best for the sphenoid sinus. Caldwell view is the occipito frontal view. The frontal sinuses are seen clearly in this view. Ref Dhingra 6/e,p 434.', 'role': 'assistant'}]