Which of the following reagents converts acid chloride to aldehyde selectively?

Step-by-step solution

The conversion of an acid chloride to an aldehyde is known as the Rosenmund reduction. The reagent used for this transformation is hydrogen gas in the presence of a palladium catalyst supported on barium sulfate ( H ₂ /Pd- BaSO ₄ ). Barium sulfate acts as a catalytic poison, which decreases the activity of palladium and prevents the further reduction of the newly formed aldehyde into a primary alcohol. Strong reducing agents like LiAlH ₄ and NaBH ₄ , as well as H ₂ /Pt, reduce acid chlorides completely to primary a