<prompt> Most common enzyme deficiency among these which leads to childhood hypertension:21 hydroxylase deficiency11-beta hydroxylase deficiency3-beta hydroxysteroid dehydrogenase deficiency17-alpha hydroxylase deficiency  <response>: Ans. B. 11-beta hydroxylase deficiencyChildhood hypertension and salt retention are seen in children with 11-beta hydroxylase deficiency and 17-alpha hydroxylase deficiency. The second most common cause of CAH after 21 hydroxylase deficiency is 11-beta hydroxylase deficiency. 