CH3-C=CH The IUPAC name of the compound is:

Explanation:

According to set of rules given by IUPAC to name an organic compound, we must calculate the number of carbons, number them and identify the functional.

Since  CH3-C=CH consists of 3 carbons, the name would contain “prop” and because of the presence of triple bonds or the alkyne functional group, the name would end with “yne”

Hence, name of the given compound = prop+ yne= propyne

Final Answer:

Hence, the correct option is C: propyne.