To solve this problem, we will analyze the reaction sequence step-by-step.$\\$The starting compound is benzonitrile (C$_6$H$_5$CN).$\\$Step 1: Reduction of Nitrile$\\$• Reagent: $$LiAlH$_4,$H$_2$O$\\$• Reaction: Reduction of the nitrile group to a primary amine.$\\$• Product: Benzylamine (C$_6$H$_5$CH$_2$NH$_2). \\$Step 2: Diazotization$\\$• Reagent: NaNO$_2$ and HCl$\\$• Reaction: Conversion of the primary amine to a diazonium salt.$\\$• Product: Benzyl diazonium chloride (C$_6$H$_5$CH$_2$N$_2$Cl$). \\$Step 3: Hydrolysis$\\$• Reagent: H$_2$O$\\$• Reaction: Hydrolysis of the diazonium salt to form an alcohol.$\\$• Product: Benzyl alcohol (C$_6$H$_5$CH$_2$OH$). \\$The final product is benzyl alcohol, which corresponds to Option 4.