This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Molecular Biology, Subject name: Biochemistry
[{'content': 'In which phase of cell cycle, proof reading occurs? \nSelect and explain. \nA. G1, B. S, C. G2, D. M', 'role': 'user'}, {'content': 'Answer: B \nExplanation: EVENTS PHASE of cell cycle Proofreading S phase Most repairs G1 phase Mismatch repair G2 phase', 'role': 'assistant'}]