This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Substance Related and Addictive Disorders, Subject name: Psychiatry
Used for aveing tobacco dependence is: 
Select and explain. 
A. Buspirone, B. Methadone, C. Bupropion, D. Buprenophrine
C: Bupropion
Answer: C: Bupropion 
Explanation: Drugs approved for tobacco dependence are Bupropion (NDRI) Varenicline (new drug)