DNA and RNA comprise of 

(a) sugar, phosphate, base

(b) sugar, phosphate

(c) base, phosphate

(d) sugar, base

(a) DNA and RNA are nucleic acids which are found in living systems. DNA is a long polymer of deoxyribonucleotides and RNA is a long polymer of ribonucleotides. A nucleotide has 3 components - a nitrogenous base, a pentose sugar and a phosphate group.

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