Which of the following reactions gives H_2C=C | vedclass

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(C) The reaction $CH_2Br-C \equiv C-CH_2Br \xrightarrow[\Delta]{Zn} CH_2=C=C=CH_2$ is a debromination reaction.When $1,4-dibromobut-2-yne$ is treated

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$CH_2Br-C \equiv C-CH_2Br \xrightarrow[\Delta]{Zn}$

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(C) The reaction $CH_2Br-C \equiv C-CH_2Br \xrightarrow[\Delta]{Zn} CH_2=C=C=CH_2$ is a debromination reaction.When $1,4-dibromobut-2-yne$ is treated with zinc dust in the presence of heat,it undergoes elimination of two bromine atoms to form $buta-1,2,3-triene$ (also known as $allene$ derivative or $cumulene$).

Which of the following reactions gives $H_2C=C=C=CH_2$?

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