Which of the following is/are a homopolymer?ANatural rubber    Bsynthetic rubber   CGutta-percha    Dstyrene

To determine which of the options is a homopolymer, we need to understand what a homopolymer is. A homopolymer is a polymer that is composed of only one type of monomer.

Let's analyze each option:

A) Natural rubber: Natural rubber is a polymer made up of repeating units of isoprene monomers. Since it is composed of only one type of monomer, it is a homopolymer.

B) Synthetic rubber: Synthetic rubber can be made from various monomers, such as styrene and butadiene. Since it can be composed of different types of monomers, it is not a homopolymer.

C) Gutta-percha: Gutta-percha is a natural polymer obtained from the sap of certain trees. It is composed of multiple monomers, including isoprene and others. Therefore, it is not a homopolymer.

D) Styrene: Styrene is a monomer used in the production of various polymers, such as polystyrene. Since it is a monomer and not a polymer itself, it is not a homopolymer.

Based on this analysis, the only option that is a homopolymer is A) Natural rubber.