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': 'Enzymes used in DNA research programme are except: \nSelect and explain. \nA. Polymerase, B. Exonuclease, C. Nuclease, D. None', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. None Enzymes used in recombination DNA technology are nuclease (BAL-31, S1), exonuclease (III, A), endonuclease (restriction), DNase I, DNA polymerase I, DNA ligase, reverse transcriptase (RNA dependent DNA polymerase) Q, polynucleotide kinase, terminal transferase and alkaline phosphatase (not acid phosphatase)Q', 'role': 'assistant'}]