Which of the following enzyme is responsible for breaking the parental DNA helix ahead of replication fork to swivel the helix?

Correct option is A

Correct Answer: (a)
Explanation:
Topoisomerase relieves tension and prevents supercoiling by creating temporary breaks and allowing DNA to swivel ahead of the replication fork.
Information Booster:
Helicase separates the two strands by breaking H-bonds.
Topoisomerase prevents overwinding of DNA.
DNA polymerase III synthesizes new DNA strand.
DNA polymerase I replaces RNA primers.
Smooth replication requires coordinated enzyme activity.
Additional Information (Incorrect Options):
(b) & (c) are polymerases, not helix-relieving enzymes.
(d) Helicase unwinds strands but does not relieve torsional strain.