I think it A I hope this help
This feature of DNA is termed complimentary base pairing, in that the base that compliments a certain base, say A, is always paired with base T, and likewise every T has its pair partner always as A. The same holds true with C with G, and vice versa.
The DNA is located in the nucleus.<span />
Typically blue is to represent A-adenine, yellow is T-thymine, green is G-guanine, and red is C-cytosine.
