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(C) The reaction involves the nucleophilic substitution of a primary alkyl chloride with $AgCN$. $AgCN$ is a covalent compound. In such cases,the nitr

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$1-$bromo$-3-$iodobenzyl isocyanide

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(C) The reaction involves the nucleophilic substitution of a primary alkyl chloride with $AgCN$. $AgCN$ is a covalent compound. In such cases,the nitrogen atom of the cyanide group acts as the nucleophile because it has a lone pair of electrons available for bonding,while the carbon atom is less nucleophilic due to the covalent nature of the $Ag-C$ bond. Therefore,the reaction follows an $S_N2$ mechanism where the $-Cl$ group is replaced by an isocyanide $(-NC)$ group. The reaction is: $Ar-CH_2Cl + AgCN \rightarrow Ar-CH_2NC + AgCl$ where $Ar$ is the $3-$bromo$-5-$iodophenyl group. Thus,the major product is $1-$bromo$-3-$iodobenzyl isocyanide.

The structure of the major product formed in the following reaction is

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