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 immortaity of cancer cells \nSelect and explain. \nA. DNA reverse transcipatase, B. RNA polymerase, C. Telomerase, D. DNA polymerase', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Prevention of telomere shortening with every cell division, due to activity of telomerase is the cause of immortality in cancer cells, germ cells, and stem cells as it protects from cellular aging and apoptosis.', 'role': 'assistant'}]