This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
[{'content': 'Benzodiazepine binding site on GABA receptors is on ? \nSelect and explain. \nA. y-subunit, B. a-subunit, C. b-subunit, D. d-subunit', 'role': 'user'}, {'content': 'Answer: B \nExplanation: [Ref: Goodman/Gillman REF : katzung pharmacology : 14th ed The exact subunit structures of native GABA receptors are still are unknown, but it is thought that most GABA receptor are composed of alpha, beta & gamma subunits that Coassemble with some unceain stoichiometry. Binding site of GABA is on beta-subunit. Benzodiazepine site is located on the a subunit but the stabilization or completion of that site in the assembled. Structure also requires the y subunit.', 'role': 'assistant'}]