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: Pharmacology
All of the following results in detoxification of drugs except- 
Select and explain. 
A. NADPH cytochrome P450 reductase, B. Cytochrome P450, C. Cytochome oxidase, D. Monooxygenase
C: Cytochome oxidase
Answer: C: Cytochome oxidase 
Explanation: Ans. is 'c' i.e., Cytochrome oxidase o Drugs can be metabolized by cytochrome P450 dependent oxidations and cytochrome P450 independent oxidations (i.e., by monoxygenases). o NADPH cytochrome P450 reductase is same as flavin monooxygenase. o Cytochrome oxidase is involved in respiratory chain and not in drug metabolism.