The reagent(s) for the following conversion,

alcoholic KOH

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alcoholic KOH followed by

N a N H_{2}

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aqueous KOH followed by

N a N H_{2}

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Z n / C H_{3} O H

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Solution

The correct option is D alcoholic KOH followed by $N a N H_{2}$
$1, 2$ dibromoethane can be converted to acetylene by reaction with alcoholic $K O H$ followed by $N a N H_{2}$ .
In this reaction, two molecules of $H B r$ are removed and a carbon-carbon triple bond is formed.

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