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: Medicine
[{'content': 'Enzyme(s) used in polymerase chain reaction is/are: \nSelect and explain. \nA. Restriction endonuclease, B. DNA polymerase, C. Alkaline phosphate, D. RNA polymerase', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. DNA Polymerase', 'role': 'assistant'}]