Answer:
The answer is C: Guanine pairing with cytosine.
Step-by-step explanation:
DNA, the genetic material has four types of nitrogenous bases, they are Adenine, guanine, cytosine and thymine. Adenine pairs with thymine and cytosine pairs with guanine. Adenine pairs with thymine with two hydrogen bonds whereas cytosine pairs with guanine with three hydrogen bonds. Uracil is a nitrogenous base found in RNA in place of thymine.