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
[{'content': 'All of the following enzymes are involved in oxidation - reduction reactions, except \nSelect and explain. \nA. Dehydrogenases, B. Hydrolases, C. Oxygenases, D. Peroxidases', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Oxidoreductases (enzymes involved in oxidation - reduction reactions) are : dehydrogenases, oxidases, hydroperoxidases (catalase, peroxidase), oxygenases, reductases and hydroxylases (not hydrolases).', 'role': 'assistant'}]