Pharmacology General 362c8d10 Metyrapone acts by - A Inhibition of 17a-Hydroxylase B Inhibition of 21b-Hydroxylase C Inhibition of 11b-Hydroxylase D Inhibition of 3b-Hydroxysteroid dehydrogenase High-Yield Explanation Ans. is 'c' i.e., Inhbition of 11b-Hydroxylase o Metyrapone inhibits 1113-Hydroxylase in adrenal coex and prevents synthesis of hydrocoisone.