Final answer:
The answer is option B Guanine-Cytosine (G-C) base pairs have good stacking in DNA.
Step-by-step explanation:
The base pairs with good stacking in DNA are Guanine-Cytosine (G-C). The bases in DNA are held together by hydrogen bonds, and G-C base pairs form three hydrogen bonds, which provides strong stability and good stacking between the two strands of DNA. On the other hand, Adenine-Thymine (A-T) base pairs only form two hydrogen bonds, resulting in weaker stacking between the two strands.
On the other hand, Adenine-Thymine (A-T) base pairs only form two hydrogen bonds, resulting in weaker stacking between the two strands.