This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autonomic nervous system, Subject name: Pharmacology
Which among the following is the Glucocoicoid receptor blocker? 
Select and explain. 
A. Mifepristone, B. Ketoconozole, C. Mitotane, D. Trilostane
A: Mifepristone
Answer: A: Mifepristone 
Explanation: Mifepristone is anti-progesterone as well as mild glucocoicoid blocker.Ketoconazole, Mitotane, and Trilostane inhibits the synthesis of glucocoicoidsRef: Goodman Gillman 12th ed.Pg: 1184