What pair of nucleic acids in DNA is more stable under increasing heat?

In DNA, the pair of nucleic acids that is more stable under increasing heat is guanine-cytosine (G-C) pairs. This increased stability is due to the presence of three hydrogen bonds between G and C, compared to the two hydrogen bonds in adenine-thymine (A-T) pairs. As temperatures rise, the stronger bonding of G-C pairs helps maintain the integrity of the DNA structure longer than A-T pairs. Consequently, DNA with a higher G-C content generally exhibits greater thermal stability.