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Option A (Incorrect Reaction): When benzene diazonium chloride ($$\text{C}_6\text{H}_5\text{N}_2^+\text{Cl}^-$$) is treated with ethanol ($$\text{EtOH}$$), ethanol acts as a mild reducing agent. Instead of undergoing nucleophilic substitution to form phenetole ($$\text{C}_6\text{H}_5\text{OEt}$$), it reduces the diazonium salt to benzene, while ethanol itself gets oxidized to ethanal (acetaldehyde).
The correct chemical equation for this reaction is:
$$\text{C}_6\text{H}_5\text{N}_2^+\text{Cl}^- + \text{CH}_3\text{CH}_2\text{OH} \rightarrow \text{C}_6\text{H}_6 + \text{N}_2 \uparrow + \text{CH}_3\text{CHO} + \text{HCl}$$
Therefore, Option A is correct.
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