True about DNA structure:: (A) Purines are adenne and guanine & pyrimidines are uracil and cytosine, (B) Watson and Crick discovered structure in 1973, (C) Deoxyribose-phosphate backbone with bases stacked inside, (D) Mainly consists of left handed helix
Answer is C. C i.e. Deoxyribose-phosphate backbone with bases stacked inside