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': 'Which enzymatic mutation is responsible for immoality of cancer cells : \nSelect and explain. \nA. DNA reverse transciptase, B. RNA polymerase, C. Telomerase, D. DNA polymerase', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Telomerase', 'role': 'assistant'}]