Which of the following is chain-growth polymer

Chain-growth polymers are polymers formed by the reaction of monomer molecules with a reactive center on a growing chain. Examples of chain-growth polymers include polyethylene, polypropylene, polyvinyl chloride (PVC), polystyrene, polyacrylates, synthetic rubber, and many others.

Here's a step-by-step explanation:

1. Chain-growth polymerization involves the linking together of monomers with an active bond in a chain-like fashion.

2. One monomer forms the beginning of the chain and subsequent monomers are added one at a time to the chain.

3. The process continues until the polymer chain reaches a desired length.

4. The key characteristic of chain-growth polymers is that the monomers add to the polymer chain one at a time, not in large groups or blocks.

5. The growth of the polymer chain can be initiated with heat, light, or chemical initiators that start the polymerization process.

6. The resulting polymers can have a wide range of properties, depending on the type of monomers used and the length of the polymer chain.

So, without knowing the specific options you're choosing from, it's hard to say which of the following is a chain-growth polymer. But any polymer that is formed by adding monomers one at a time in a chain-like fashion is a chain-growth polymer.