1.

Which molecule represents 4-ethyl-2-hexyne ?

Answer»

`(CH_3CH_2)_2 CHC -= "CCH" (CH_2CH_3)_2`
`(CH_3CH_2)_2CHC -= "CCH"_2`
`CH_2CH_2C -= "CCH"_2CH_2 CH_3`
`CH_3CH_2CH_2C -= "CCH"_3`

ANSWER :B


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