DNA polymerase are required for
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:-


DNA polymerase I  5' → 3' polymerase activity
	                             5' → 3' exonuclease activity
	                             3' → 5' exonuclease activity


DNA polymerase II   Proofreading, DNA repair
DNA polymerase III 5' → 3' polymerase activity
                              3'→ 5' exonuclease
5 – 3 polymerase activity
3 – 5  exonuclease activity
5 – 3  exonuclease activity
All of these