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 of the following is a ribozyme \nSelect and explain. \nA. Peptidyl transferase, B. Elongation factor 2, C. Primase, D. RNA polymerase', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Peptidyl-tranferase is a ribozyme.', 'role': 'assistant'}]