This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
"Proofreading" is the role of 
Select and explain. 
A. DNA primase, B. DNA Polymerase, C. Exonuclease I, D. Restriction endonuclease
B: DNA Polymerase
Answer: B: DNA Polymerase 
Explanation: "Polymerase II (pol II) is mostly involved in proofreading and DNA repair. Polymerase I (pol I) completes chain synthesis between Okazaki fragments on the lagging strand.