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: Pharmacology
Buprenorphine is calssified as - 
Select and explain. 
A. Paial agonist at m receptor, B. Paial agonist at K receptor, C. Full agonist at m receptor, D. Full agonist at K receptor
A: Paial agonist at m receptor
Answer: A: Paial agonist at m receptor 
Explanation: Ans. is 'a' i.e., Paial agonist at receptor o Buprenorphine is paial agonist on mu receptor and antagonist at Kappa receptor.