DNA contains adenine (A)-18%, which of the following base proportion confirms that it is mainly double stranded DNA.
T- 18%, G-32%, C-32%
T-32%, G- 18%, C-32%
T- 18%, G-18%, C-32%
T-18%, G-32%, C-18%
A-18%
A=T=18%
Therefore, A+T= 18+18=36%
G+C= 100-36=64%
%G=%C=32 %