This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Poisoning, Subject name: Forensic Medicine
Methadone is used in treatment of overdose of - 
Select and explain. 
A. Cocaine, B. Heroin, C. Amphetamine, D. Barbiturate
B: Heroin
Answer: B: Heroin 
Explanation: Heroin/brown sugar Treatment-methadone 40mg daily should be given REF;THE SYNOPSIS OF FORENSIC MEDICINE:KS NARAYANA REDDY;28th EDITION;PAGE NO 337