Answer:
B) Cytosine pairs with guanine in both.
Explanation:
DNA replication is the process by which DNA makes an identical copy of itself during cell division. In this process the DNA polymerase adds a new strand of DNA to the template strand by matching Cytosines with Guanines and Adenines with Thymines.
In transcription a copy of a specific DNA fragment is made, however, this copy has Adenines paired with Uracils instead Adenines with Thymines.
In both, replication and transcription Cytosine pairs with guanine.