It contains a phosphate group for every nucleotide.

A. DNA

B. RNA

C. both DNA and RNA

D. neither DNA nor RNA

The correct option is c (both DNA and RNA).

Reason:

Both DNA and RNA is made from samll unit called nucleotide. Each nucleotide is composed of three components:

1. pentose sugar

2. phosphate group, and

3. nitrogenous base.

The structure of nucleotide is given in figure.