Answer:
Uracil.
Explanation:
DNA is present as genetic material in all the living organism except some viruses. DNA is made of the polymers of nucleotides and shows anti parallel polarity.
The structure of nucleotide consists of pentose sugar, nitrogenous bases and phosphate group.The nitrogenous base pair of DNA contains adenine, thymine, cytosine and guanine. Uracil is present in the RNA not in the DNA molecule.
Thus, the correct answer is option (C).