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': 'Maximum radiation exposure occurs in \nSelect and explain. \nA. Bone scan, B. X-ray, C. MRI, D. CT scan', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. d. CT scan Maximum radiation exposure occurs in CT scan among the given options.', 'role': 'assistant'}]