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': 'Phase of the Cell cycle which is most sensitive to radiation \nSelect and explain. \nA. G,S, B. GI, G2, C. G,M, D. GO, G1DEXA scan', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. c. G2M', 'role': 'assistant'}]