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 nicotine de-addiction, except: NIMHANS 10, 11 
Select and explain. 
A. Bupropion, B. Clonidine, C. Nicotine gum, D. Buspirone
D: Buspirone
Answer: D: Buspirone 
Explanation: Ans. Buspirone