<prompt> Most common cause of congenital hypothyroidism: RepeatThyroid dysgenesisMaternal antibodiesInborn errors of thyroid hormone defectsMaternal iodine deficiency  <response>: Ans: A Thyroid dysgenesis Ref: Nelsons Textbook of Pediatrics. 19th Edition. Pg.1895Explanation:Most cases of congenital hypothyroidism results from thyroid dysgenesis Ref: NelsonRefer 2013 Pediatrics Question Explanation 