Pediatrics MC deficient enzyme in Congenital adrenal hyperplasia: March 2013 A 21-hydroxylase deficiency B 18-hydroxylase deficiency C 3-beta-hydroxysteroid dehydrogenase deficiency D 17-alpha hydroxylase deficiency 💡 Explanation MC deficient enzyme in Congenital adrenal hyperplasia: March 2013 ✓ Correct Answer: A. 21-hydroxylase deficiency