Task: Class Relation Understanding (ontology: Sciences/Biology)

Which of the following classes is one valid superclass of 'acyl-lipid omega-3 desaturase (cytochrome b5) activity'?

A. 'de novo' cotranslational protein folding
B. 2-hydroxybenzoyl-CoA metabolic process
C. oxidoreductase activity, acting on paired donors, with oxidation of a pair of donors resulting in the reduction of molecular oxygen to two molecules of water
D. (R)-pantolactone dehydrogenase (flavin) activity

Answer: oxidoreductase activity, acting on paired donors, with oxidation of a pair of donors resulting in the reduction of molecular oxygen to two molecules of water