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': 'In radiographic study of impacted teeth: \nSelect and explain. \nA. Bite wing X-rays are of no use, B. Occlusal view is useless, C. Bite wing X-rays are indispensable, D. All of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]