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
All of the following agents are used in obesity EXCEPT : 
Select and explain. 
A. Orlistat, B. Sibutramine, C. Olestra, D. Neuropeptide Y analogues
D: Neuropeptide Y analogues
Answer: D: Neuropeptide Y analogues 
Explanation: Drugs used for the treatment of obesity are:

Fenfluramine
Sibutramine (serotonin and NA reuptake inhibitor)
Sucrose polyester (olestra)
β3 agonists
Dexfenfluramine
Orlistat (a Pancreatic lipase inhibitor)
Neuropeptide Y antagonists