What is the name of the molecule below? O A. 1-ethyne
B. 1-butyne
C. 2-butyne
D. 2-ethyne

C.) 2-butyne

Explanation:

Since the molecule has 4 central carbons, it has the prefix but-.

Since the molecule has a triple bond between central carbons, it has an ending of -yne.

Since the triple bond starts on the second carbon, it has a 2 - prefix.

the answer is:  

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