Which of the following base pairs is correctly matched in DNA?

The correct pairing of base pairs in DNA follows specific rules known as complementary base pairing. In DNA, adenine (A) pairs exclusively with thymine (T), and guanine (G) pairs with cytosine (C). Hence, one of the critical characteristics of DNA structure is that A forms two hydrogen bonds with T, and G forms three hydrogen bonds with C.

In the option identified as correct, while it does mention C pairing with G, it incorrectly states T pairs with A, which is indeed correct. However, the vital point here is the pairing rules: G does not pair with A, as they are not complementary.

Therefore, focusing on the correct relationships, A always pairs with T, and G always pairs with C, which can be seen in the option that states A pairs with T and G pairs with C. This option reflects the accurate base pairing rules essential for the structure and stability of the DNA molecule. The double-stranded helical structure of DNA relies on these specific pairings to maintain the genetic code and facilitate reliable DNA replication and transcription processes.