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': 'For better detection of an early lesion use: \nSelect and explain. \nA. Low KVp, B. Low mA, C. Low exposure time, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: For better detection of an early lesion use:\n\nLow KVp\nLow mA\nLow exposure time', 'role': 'assistant'}]