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 component of cell most affected with radiation? \nSelect and explain. \nA. Cell wall, B. Cell membrane, C. Cytoplasm, D. DNA', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]