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': 'DNA polymerase are required for \nSelect and explain. \nA. 5 – 3 polymerase activity, B. 3 – 5  exonuclease activity, C. 5 – 3  exonuclease activity, D. All of these', 'role': 'user'}, {'content': "Answer: D \nExplanation: As the question has not specified the type of DNA polymerase whether type I, II & III, So, consider all three & lets have a look of the properties of all 3:-\n\n\nDNA polymerase I \xa05' → 3' polymerase activity\n\t\xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa05' → 3' exonuclease activity\n\t\xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa03' → 5' exonuclease activity\n\n\nDNA polymerase II \xa0 Proofreading, DNA repair\nDNA polymerase III 5' → 3' polymerase activity\n\xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 3'→ 5' exonuclease", 'role': 'assistant'}]