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(B) $1.$ Reaction of $PhCOOH$ with $PCl_5$ followed by $NH_3$ yields benzamide $(PhCONH_2)$,which is product $A$.$2.$ Dehydration of benzamide $(PhCON

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benzylamine

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(B) $1.$ Reaction of $PhCOOH$ with $PCl_5$ followed by $NH_3$ yields benzamide $(PhCONH_2)$,which is product $A$.$2.$ Dehydration of benzamide $(PhCONH_2)$ with $P_4O_{10}$ under heating gives benzonitrile $(PhCN)$.$3.$ Catalytic hydrogenation of benzonitrile $(PhCN)$ with $H_2/Ni$ reduces the nitrile group to a primary amine,resulting in benzylamine $(PhCH_2NH_2)$,which is product $B$.

Consider the following sequence of reactions:
$PhCOOH$ $\xrightarrow[2. NH_3]{1. PCl_5} A$ $\xrightarrow[2. H_2/Ni]{1. P_4O_{10}, \text{heat}} B.$
The final product $(B)$ is:

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Consider the following sequence of reactions:$PhCOOH$ $\xrightarrow[2. NH_3]{1. PCl_5} A$ $\xrightarrow[2. H_2/Ni]{1. P_4O_{10}, \text{heat}} B.$The final product $(B)$ is: