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: Pathology
[{'content': 'The tumor suppressor gene ? 53 induces cell cycle arrest at: \nSelect and explain. \nA. G2- ? phase, B. S-G2 phase, C. G, - S phase, D. G phase', 'role': 'user'}, {'content': 'Answer: C \nExplanation: . G, &; S phase', 'role': 'assistant'}]