CH3COCl+H2Pd−−−→BaSO4CH3CHO+HCl
CH2=CH2+H2OPd2+−−−→CH3CHO
All of the above
CH3CNSnCl2−−−→HClCH2CH=NHH3O+−−−→CH3CHO
The industrial method of production of acetaldehyde is the oxidation of ethylene by the Wacker process, which involves oxidation of ethylene using a homogeneous palladium/copper system. Hence, C is the correct answer.