Answer:
D) 10.5
Step-by-step explanation:
DNA which is known as Deoxyribonucleic acid have base pairs which are the building blocks of the DNA. The base pairs are known as Adenine-Thymine base pair and Guanine-Cytosine base pair.
DNA studies by scientist however have found that there are approximately 10.5 base pairs in two turns of a B-DNA double helix.