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: Unknown
Hemoperfusion with charcoal is useful in poisoning with: - 
Select and explain. 
A. Phenytoin, B. Methyl alcohol, C. Lithium, D. Ethylene glycol
A: Phenytoin
Answer: A: Phenytoin 
Explanation: Hemoperfusion should be considered in cases of severe poisoning due to