Multiple choice

Goitre is caused by the deficiency of

  1. iron

  2. iodine

  3. glucose

  4. calcium

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Iodine deficiency causes the thyroid gland to enlarge (goiter) as it struggles to produce thyroid hormones. The gland grows trying to compensate for insufficient iodine needed for hormone synthesis. Iron deficiency causes anemia, calcium deficiency affects bones.