Which Base Pair(s)typically Occur(s)in Double-Stranded DNA

Question

Which base pair(s)typically occur(s)in double-stranded DNA?
A)G·C
B)G·T
C)G·A
D)G·G

Accepted Answer

G·C is the only correct option as it forms three hydrogen bonds, whereas G·T and G·A form only two hydrogen bonds and G·G is not a valid base pairing combination.