Match the reagents in List-I with the corresponding reactions in List-II:

List-I (Reagent) A. $H_2, Pd-BaSO_4$ B. (i) $CrO_2Cl_2, CS_2$ (ii) $H_2O/H^+$ C. $CO, HCl, \text{Anhyd. } AlCl_3/CuCl$ D. $CHCl_3, NaOH$

List-II (Name of the reaction) I. Gattermann-Koch reaction II. Reimer-Tiemann reaction III. Etard reaction IV. Rosenmund reduction

Choose the correct answer from the options given below:

Let's match the reagents with their corresponding name reactions:

1. $H_2$ in the presence of $Pd-BaSO_4$ is the catalytic reagent used in the Rosenmund reduction to reduce acid chlorides to aldehydes (A → IV).
2. Chromyl chloride ($CrO_2Cl_2$) in $CS_2$ followed by acid hydrolysis ($H_2O/H^+$) is used in the Etard reaction to oxidize toluene to benzaldehyde (B → III).
3. Carbon monoxide ($CO$) and $HCl$ gas in the presence of anhydrous $AlCl_3/CuCl$ are used in the Gattermann-Koch reaction to form benzaldehyde from benzene (C → I).
4. Chloroform ($CHCl_3$) and aqueous $NaOH$ are the reagents for the Reimer-Tiemann reaction, which converts phenol into salicylaldehyde (D → II).

Therefore, the correct matching sequence is A-IV, B-III, C-I, D-II.