Which of the following is not a natural polymer?

Options

A. Neoprene
B. Gun-cotton
C. Silk
D. Both (1) and (2)

Answer

D

Explanation

Neoprene is a synthetic derived from the monomer chloroprene. Gun-cotton (cellulose nitrate, used in making explosives) is a semi synthetic polymer. Silk is a typical example of a natural polymer.
Natural polymers include proteins, nucleic acid. Cellulose (polysaccharide), and rubber (polyisoprene).