Low level of Thyroxine hormone is correlated with
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Iodine deficiency
Thyroxine, the hormone of the thyroid gland, contains iodine; without enough iodine in the diet too little thyroxine is made, so a low level of thyroxine is correlated with iodine deficiency.
Why the other options are incorrect
Option (2) Vitamin A deficiency — Incorrect. It causes night blindness and xerophthalmia (hardening of the cornea), not a thyroid disorder.
Option (3) Vitamin C deficiency — Incorrect. It causes scurvy, with bleeding gums.
Option (4) Vitamin D deficiency — Incorrect. It causes rickets in children and osteomalacia in adults.
NCERT (2026-27 edition):
Hormones – …
