Deficiency of iodine in the diet may lead to reduced production of thyroxine hormone. Which of the following conditions might arise due to deficiency of thyroxine?

The correct option is C Goitre

Deficiency of iodine leads to reduced production of thyroxine hormone. This hormone is produced by the thyroid gland. The thyroid gland will enlarge as it tries to increase the production of the thyroxine hormone. The enlarged thyroid can cause the neck to swell. This condition is known as goitre.

So, the correct answer is option A.