The nitrogenous base exclusive to RNA is
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → uracil
Nucleic acids contain two kinds of nitrogenous bases: purines (adenine, guanine) and pyrimidines (cytosine, thymine, uracil). The two also differ in their sugar: 2-deoxy-D-ribose in DNA and D-ribose in RNA.
NCERT (2026-27 edition):
Chemical Composition of Nucleic Acids – …
