Which is thermosetting polymera.Butadieneb.Nylon 66c.ResolResol d.NovolecClear my choice

The thermosetting polymer among the options you provided is c. Resol.

Thermosetting polymers are a type of polymer that becomes irreversibly hard when heated. They are also known as thermosets. They start as a liquid or a soft solid, and then they are heated, they undergo a chemical change that results in a hard, infusible product that cannot be remelted.

Resol is a type of phenolic resin, which is a thermosetting polymer. It is used in a variety of applications, including the production of molded products, laminates, and coatings.

On the other hand, Butadiene and Nylon 66 are thermoplastic polymers, which can be melted and reshaped multiple times, and Novolac is a type of phenolic resin that requires a curing agent to become a thermoset.