Choose the Gattermann-Koch reaction:

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(A) The Gattermann-Koch reaction is a chemical reaction in which benzene is converted to benzaldehyde by treatment with carbon monoxide $(CO)$ and hyd

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(A) The Gattermann-Koch reaction is a chemical reaction in which benzene is converted to benzaldehyde by treatment with carbon monoxide $(CO)$ and hydrogen chloride $(HCl)$ in the presence of a Lewis acid catalyst,typically anhydrous aluminum chloride $(AlCl_3)$ and cuprous chloride $(CuCl)$.The reaction is represented as:$C_6H_6 + CO + HCl \xrightarrow{Anhyd. AlCl_3/CuCl} C_6H_5CHO$Option $A$ correctly represents this reaction.

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