Correct option is A
Explanation-
(A) DNA Topoisomerase I → (iv) Single strand nicking
Topoisomerase I relieves supercoiling by making a single-strand nick, allowing rotation, then rejoining it.
(B) DNA Topoisomerase II → (iii) Double strand break and ligation
Topoisomerase II cuts both strands (double-strand break) to untangle DNA during replication and then re-ligates them.
(C) Polymerase ε (epsilon) → (ii) Leading strand synthesis
Polymerase epsilon is mainly responsible for leading strand DNA synthesis during replication in eukaryotes.
(D) Polymerase δ (delta) → (i) Synthesis of Okazaki fragments
Polymerase delta primarily carries out lagging strand synthesis (Okazaki fragments) in eukaryotic replication.
Correct Option:
Option a : A: iv; B: iii; C: ii; D: i
