The formula that can represent an alkyne is 3. C3H4.
Alkylnes are organic compound and unsaturated hydrocarbons which is formed by carbon-carbon triple bond.
The triple bonds that are fromed between carbon are one alpha and two sigma bonds.
Thus, the correct option is 3. C3H4
Learn more about alkynes
https://brainly.com/question/23508203
#SPJ2
