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
Enzymes used in DNA research programme are except: 
Select and explain. 
A. Polymerase, B. Exonuclease, C. Nuclease, D. None
D: None
Answer: D: None 
Explanation: 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