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 tumour suppressor gene p53 induces cell arrest at \nSelect and explain. \nA. S - phase, B. S- G2 phase, C. G2 - M phase, D. G1 - S phase', 'role': 'user'}, {'content': 'Answer: D \nExplanation: . G1 aEUR" S phase', 'role': 'assistant'}]