Answer:E. Adenine and Guanine
Explanation:the DNA is a long ,linear chain of subunits called nucleotides.each nucleotides contains a sugar phosphate which is deoxyribose phosphate and also nitrogenous bases.
Nitrogenous bases usually contains carbon, hydrogen, oxygen and nitrogen.
The nitrogenous base are adenine, cytosine, guanine and thymine.
Adenine and guanine are purines.
Cytosine and thymine are pryrimidine.
In RNA , thymine is replaced by uracil