This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Pharmacology
The most potent Narcotic Analgesic is 
Select and explain. 
A. Morphine, B. Buprenorphine, C. Codeine, D. Pentazocine
B: Buprenorphine
Answer: B: Buprenorphine 
Explanation: (B) Buprenorphine