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': 'To capture palatal root, the X-ray film should be placed \nSelect and explain. \nA. At the median raphe of the palate, B. At a 15 degree angle to the tooth, C. As close to the tooth, D. On the opposite side of the midline', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]