The given molecule in the figure is 1-butyne. Thus, option B is correct.
1-butyne is an organic chemical compound with the formula C₄H₆ or HC₂CH₂CH₃. It is an alkyne group compound as it contains a triple bond between the first and the second carbon of the chain.
There are a total of nine bonds present between the atoms of the compound, which contains four carbon and one alkyne group.
Therefore, the given molecule is option B. 1-butyne.
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