Maximum amount of energy/ATP is liberated on oxidation of

The maximum amount of energy/ATP is liberated on oxidation of Fats.
Fatty acid oxidation is the mitochondrial aerobic process of breaking down a fatty acid into acetyl-CoA units.
The end products of fatty acid oxidation include acetyl-CoA, FADH₂, NADH, water and one acyl-CoA chain that is two carbons shorter. The acetyl-CoA enters the Krebs or citric acid cycle with FADH₂ and NADH to yield ATP (adenosine triphosphate), which is used for energy.