This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pharmacology
[{'content': 'All of the following are Glucocoicoid synthesis Inhibitors except? \nSelect and explain. \nA. Metyrapone, B. Mifepristone, C. Etomidate, D. Ketoconazole', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Mifepristone is a pharmacological antagonist at the steroid receptor. It is not a Glucocoocoid synthesis. Enzyme Inhibitor. Glucocoicoid synthesis Inhibitors & Glucocoicoids Antagonists: Glucocoocoid synthesis enzyme Inhibitors Blockade of Coisol Action Adrenal Enzyme Inhibitors Ketoconazole Metyrapone Etomidate Adrenolytic agents Mitolane (It also inhibits CYP11A1 thereby reducing steroid synthesis) Mifepristone Ref: Goodman and Gilman 13th edition Pgno: 858', 'role': 'assistant'}]