To solve this problem, we need to match the reactions in List-I with their corresponding names in List-II.$\\$Let's analyze each reaction:$\\$(a) The reaction involves benzene with CO and HCl in the presence of anhydrous AlCl$_3$ and CuCl.$\\$This is the Gattermann-Koch reaction, which forms benzaldehyde derivatives.$\\$So, (a) matches with (ii).$\\$(b) The reaction involves a methyl ketone with NaOX.$\\$This is the Haloform reaction, which produces haloforms like chloroform.$\\$So, (b) matches with (iii).$\\$(c) The reaction involves an alcohol and a carboxylic acid with conc. H$_2$SO$_4. \\$This is an Esterification reaction, forming esters.$\\$So, (c) matches with (iv).$\\$(d) The reaction involves a carboxylic acid with $X_2$ and Red P, followed by hydrolysis.$\\$This is the Hell-Volhard-Zelinsky reaction, which halogenates carboxylic acids.$\\$So, (d) matches with (i).$\\$Therefore, the correct matching is:$\\$(a)-(ii), (b)-(iii), (c)-(iv), (d)-(i).$\\$This corresponds to Option 4.