Among the following,the number of reaction(s) | vedclass

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(D) Let us analyze each reaction:$I$. Gattermann-Koch reaction: Benzene reacts with $CO$ and $HCl$ in the presence of anhydrous $AlCl_3/CuCl$ to form

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$4$

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(D) Let us analyze each reaction:$I$. Gattermann-Koch reaction: Benzene reacts with $CO$ and $HCl$ in the presence of anhydrous $AlCl_3/CuCl$ to form benzaldehyde. This is a standard method for the preparation of benzaldehyde.$II$. Hydrolysis of benzal chloride: Benzal chloride $(C_6H_5CHCl_2)$ on hydrolysis with water at $100 \ ^\circ C$ yields benzaldehyde $(C_6H_5CHO)$.$III$. Rosenmund reduction: Benzoyl chloride $(C_6H_5COCl)$ is reduced to benzaldehyde using $H_2$ in the presence of $Pd-BaSO_4$ (Lindlar's catalyst).$IV$. Reduction of ester: Methyl benzoate $(C_6H_5CO_2Me)$ is reduced to benzaldehyde using $DIBAL-H$ at $-78 \ ^\circ C$ followed by hydrolysis.All four reactions produce benzaldehyde. Therefore,the total number of reactions is $4$.

Among the following,the number of reaction$(s)$ that produce$(s)$ benzaldehyde is

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