What term describes the relationship of bases pairing with each other in DNA?

The term "complementary" accurately describes the relationship between the bases in DNA, referring to how specific bases pair with each other to create the structure of the DNA double helix. In DNA, adenine pairs with thymine, and cytosine pairs with guanine. This base pairing is crucial for the stability of the DNA molecule and is fundamental for processes such as DNA replication and transcription. The complementary nature of these base pairings ensures that genetic information can be accurately copied and maintained across generations of cells.

The other terms provided do not specifically refer to the relationships between the bases in DNA. "Antiparallel" describes the orientation of the two strands of DNA running in opposite directions rather than the pairing of bases. "Homologous" usually refers to chromosomes or genes that share a common ancestry, which is distinct from base pairing. "Variegated" pertains to diversity in appearance, often used in botany or culture, which is irrelevant to DNA base pairing. Thus, "complementary" is the most precise term to convey the relationship of base pairing in DNA.