(a) purine, pyrimidine and phosphate(b) purine, sugar and phosphate(c) nitrogen base, sugar and phosphate(d) pyrimidine, sugar and phosphate[CBSE AIPMT 1991]
Correct Option (c) Reason : Nucleotide is the basic unit of nucleic acids (DNA and RNA). It is composed of nucleoside (nitrogeneous base + pentose sugar) and phosphate
group.