With regard to the Rosenmund reduction, which of the following functional group pairs corresponds to the reactant and product, respectively?

W) Ester and alcohol

X) Acyl [AS-III] chloride and aldehyde [AL-duh-hyd]

Y) Amide and amine [uh-MEEN]

Z) Ketone and alkane [AL-kayn]
X) ACYL CHLORIDE AND ALDEHYDE