which is composed of alkynes?\n○ acetylene\n○ margarine\n○ rubber tires\n○ polystyrene cups

which is composed of alkynes?\n○ acetylene\n○ margarine\n○ rubber tires\n○ polystyrene cups
Answer
Answer:
A. acetylene
Brief Explanations:
Alkynes are hydrocarbons with carbon - carbon triple bonds. Acetylene ($C_2H_2$) is the simplest alkyne. Margarine is a fat, rubber tires are made of polymers from isoprene units, and polystyrene cups are made from polystyrene polymer, none of which are alkynes.