Final answer:
Only C₃H₄ can have a triple bond.
Step-by-step explanation:
Out of the given compounds, only C₃H₄ can have a triple bond. A triple bond consists of one sigma bond and two pi bonds between two atoms. In the case of C₃H₄, the carbon atoms can form a triple bond with each other, resulting in a molecule with a linear shape and three sigma bonds.