Answer:
The answer is 2-butyne.
Step-by-step explanation:
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In the attached molecule we see that it has 4 carbons by what is called butane. At the same time we see that it has a triple bond for what belongs to the group of alkynes.
In this case the name is butino (with the ending -ino indicating that it is an alkyne.)
In this case the name is 2-butino because the triple bond is located in the second carbon.
We conclude that the answer is 2-butyne.