What holds base pairs together? a pairs of double-ringed nucleotides b sugar-phosphate backbones c hydrogen bonds d nitrogen-carbon bonds

C

Explanation:

DNA has double strands. Adenine pairs with Thymine and Guanine pairs with Cytosine. These pairs are bonded together by hydrogen bonds in different strands but on the same strands two nucleotide bind to each other by phosphodiester bond.