UKMLA PLAB AMC USMLE Prometric MCQ

a) the world-wide prevalence is about 1 in 4000
b) Thyroid dysgenesis is commoner in females
c) is defined as a serum level of T4 of less than 1%
d) thyroid ectopia is associated with thyroglossal duct cysts
e) when due to a defect in the biosynthesis of thyroid hormone a goiter is usually present