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
The main enzyme responsible for activation of xenobiotics is (detoxification) 
Select and explain. 
A. Cytochrome P-450, B. Glutathione S-transferase, C. NADPH cytochrome P-450-reductase, D. Glucuronyl transferase
A: Cytochrome P-450
Answer: A: Cytochrome P-450 
Explanation: None