What is the most common cause of hypothyroidism world-wide?: (A) Hashimoto thyroiditis, (B) Subacute thyroiditis, (C) Silent thyroiditis, (D) Iodine deficiency
Answer is D. Most common cause of hypothyroidism worldwide is IODINE DEFICIENCY In case of Iodine sufficiency most common cause of hypothyroidism : Autoimmune disease (Hashimoto Thyroiditis) and iatrogenic.