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
All are used in heroin poisoning EXCEPT: 
Select and explain. 
A. Cloni di ne, B. Buprenorphine, C. Pentazocine, D. Haloperidol
D: Haloperidol
Answer: D: Haloperidol 
Explanation: D i.e. Haloperidol