This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
All of the following enzymes are involved in oxidation reduction reactions, Except 
Select and explain. 
A. Dehydrogenases, B. Hydrolases, C. Oxygenases, D. Peroxidases
B: Hydrolases
Answer: B: Hydrolases 
Explanation: Enzymes involved in oxidation (removal of e-) and reduction (gain of electrons) are called oxido - reductase and are classified into 4 groups: oxidase, oxygenase, dehydrogenase, hydroperoxidase (peroxidase and catalase).Hydrolase is another class of enzyme that catalyzes hydrolysis i.e. cleavage of bonds by addition of water.