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: Forensic Medicine
Activated charcoal is used in: 
Select and explain. 
A. Alcohol, B. Barbiturate, C. Heavy metal poisoning, D. Lead poisoning
B: Barbiturate
Answer: B: Barbiturate 
Explanation: B i.e. Barbiturate