Ans.
Replication can be defined as a process, which involves synthesis of daughter DNA strands from parent DNA molecule by DNA polymerase enzyme. This process takes place during S phase (synthesis phase) of cell cycle.
In parent DNA molecule, two DNA strands are present, having complementary base pairs. During replication, these double strands get unwind and provide templates to produce their replica (copies), which result in formation of two newly formed DNA molecules.
Thus, the correct answer is option). 'DNA.'
