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': 'The X-ray which are mostly like to be absorbed by the\ntissues and produce an injury: \nSelect and explain. \nA. X-rays of long wavelength, B. X-rays of short wavelength, C. Filtered X-rays, D. Central rays', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]