Answer:
c.Cytosine and uracil
Explanation:
Two types of Nitrogenous bases(heterocyclic aromatic molecules) are found in DNA and RNA: 1.Pyrimidines and 2.Purines
Pyrimidines:Thymine(5-methyl-2,4-dioxypyrimidine) and Cytosine(2-oxy-4-aminopyrimidine) are found in DNA . Uracil (2,4-dioxypyrimidine) and Cytosine (2-oxy-4-aminopyrimidine) are found in RNA.
Purines:Adenine (6-aminopurine) and Guanine(6-oxy-2-aminopurine) are the two purine bases that are found in both DNA and RNA.
