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': "Best view for frontal sinus: \nSelect and explain. \nA. caldwell, B. Towne, C. Walter's, D. Lateral view", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Caldwell view: (a) Frontal sinuses (seen best). (b) Ethmoid sinuses. (c) Maxillary sinuses. (d) Frontal process of zygoma and zygomatic process of frontal bone. (e) Superior margin of orbit and lamina papyracea. (f) Superior orbital fissure. (g) Foramen rotundum (inferolateral to superior orbital fissure). Ref: Dhingra 7e pg 494.', 'role': 'assistant'}]