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
[{'content': 'Inverse agonist is - \nSelect and explain. \nA. Buspirone, B. b-carboline, C. Flumazenil, D. Zolpidem', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., b-carboline Drugs acting at BZD site of GABAA receptors o Agonist at BZD site of GABAA receptor -4 Benzodiazepine, Zolpidem, Zopiclone, Zoleplon. o Inverse agonist at BZD site of GABAA receptor --> b-carboline o Competitive antagonist at BZD site of GABAA receptor ---> Flumazenil", 'role': 'assistant'}]