________ is a thyroid hormone which controls the balance of calcium in the body. A. Calcitonin B. Thyroxine C. Calmodulin D. All of these

The correct answer is: A. Calcitonin

Calcitonin is a thyroid hormone that helps to regulate the levels of calcium in the blood. It does this by inhibiting the release of calcium from the bones and by increasing the absorption of calcium from the intestines. Calcitonin is also involved in the metabolism of bone and in the maintenance of bone health.

Thyroxine is another thyroid hormone, but it does not have a direct effect on calcium levels. Thyroxine is involved in the regulation of metabolism and growth. Calmodulin is