Which pairing occurs during DNA replication?

During DNA replication, the correct pairing involves specific nucleotides that follow the rules of complementary base pairing. Cytosine pairs with guanine through three hydrogen bonds, ensuring that the genetic information is accurately copied. This specific pairing is crucial for maintaining the integrity of the DNA strand and preserving the genetic code during the replication process.

In contrast, adenine pairs exclusively with thymine in DNA, while uracil replaces thymine in RNA. Consequently, the other options mentioned do not accurately represent the base pairing rules as they pertain to DNA replication. The pairing of cytosine with guanine is foundational for the structure and function of the DNA molecule.