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': 'GABA- B receptor is which type of receptor - \nSelect and explain. \nA. Inotropic receptor, B. Metabotropic transmembrane receptor, C. Ligand gated ion channel, D. Intrinsic ion channel', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans: B. Metabotropic transmembrane receptor(Ref : KDT //e p. 399, 402 6 6h/e p. 395; Katzung 17th/e p' 377-378; lP/e p' 355)Metabotropic recePtors:Are G-protein coupled receptors which act through second messenger.Examples: GABA-B receptors, Muscarinic (M1 to M5)", 'role': 'assistant'}]