The iodine containing hormone produced by our body is

The correct answer is Option (1) → thyroxine

Hormones are chemical messengers made by the endocrine glands and carried by the blood to the organs where they act. Chemically they belong to different classes:

• Amino acid derivatives: thyroxine (thyroid gland) and adrenaline (adrenal gland). Thyroxine is an iodinated derivative of the amino acid tyrosine; it controls the rate of metabolism.

• Polypeptides: insulin and glucagon (pancreas), which control the blood glucose level.

• Steroids: estrogens and androgens (sex hormones), glucocorticoids and mineralocorticoids.

Abnormally low thyroxine, often due to too little iodine in the diet, leads to hypothyroidism and an enlarged thyroid gland (goitre). So the iodine containing hormone is thyroxine.

NCERT (2026-27 edition):
Haloalkanes and Haloarenes – “… Our body produces iodine containing hormone, thyroxine, the deficiency of which causes a disease called goiter. …”