Which is composed of alkynes?

A) acetylene

B) margarine

C) rubber tires

D) polystyrene cups

The correct answer is letter (A) Acetylene. Acetylene is the most simplest form of alkyne and at the same time a hydrocarbon. It is unsaturated because of the presence of only two carbon atoms that are bonded together in a triple bond. I n its pure, it is unstable and thus, it is usually held and handled as a solution.

The correct answer is A) Acetylene