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: Medicine
Metyrapone inhibits- 
Select and explain. 
A. 11-B-hydroxylase, B. 21-B-hydroxylase, C. Both, D. None
A: 11-B-hydroxylase
Answer: A: 11-B-hydroxylase 
Explanation: mineral I coical is specificially achieved by local metabolism of coisol to inactive compound coisone by 11B hyroxylase which is inhibited by metyrapone ( Harrison 17 pg 2248)