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
Most of the detoxification reactions are mainly carried out in: 
Select and explain. 
A. Liver, B. Brain, C. Kidney, D. Spleen
A: Liver
Answer: A: Liver 
Explanation: Most of the detoxification reactions are mainly carried out in liver, as cytochrome P450 is found in liver in the highest concentration.