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
Dysphoria is mediated by which opoid receptor - 
Select and explain. 
A. Mu, B. Kappa, C. Delta, D. None
B: Kappa
Answer: B: Kappa 
Explanation: Ans. is 'b' i.e., Kappa o Euphoria Mu receptors Dysphoria --> Kappa receptors