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(D) The reaction sequence is as follows:$1$. The starting material is $2$-amino-$3$-cyano-benzaldehyde.$2$. Treatment with $CHCl_3/KOH$ (carbylamine r

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(D) The reaction sequence is as follows:$1$. The starting material is $2$-amino-$3$-cyano-benzaldehyde.$2$. Treatment with $CHCl_3/KOH$ (carbylamine reaction) converts the $-NH_2$ group into an isocyanide group $(-NC)$.$3$. Subsequent reduction with $Pd/C/H_2$ reduces the isocyanide $(-NC)$ to a methylamino group $(-NHCH_3)$,the aldehyde group $(-CHO)$ to a secondary alcohol $(-CH(OH)CH_3)$,and the nitrile group $(-CN)$ to a primary amine $(-CH_2NH_2)$.

The major product obtained in the following reaction is:

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