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: Biochemistry
[{'content': "Action of 'Telomerase' is \nSelect and explain. \nA. DNA repair, B. Longetivity of cell - Ageing, C. Breakdown of telomer, D. None", 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Longetivity of cell- aging', 'role': 'assistant'}]