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': 'Cancer cells express Telomerase which is: \nSelect and explain. \nA. RNA-dependent DNA polymerase, B. DNA-dependent DNA polymerase, C. DNA-dependent DNA polymerase, D. RNA-dependent DNA polymerase', 'role': 'user'}, {'content': 'Answer: D \nExplanation: RNA-dependent DNA polymerase', 'role': 'assistant'}]