The correct answer is B. Thyroxin.
Thyroxin is a thyroid hormone that regulates carbohydrate metabolism. It is produced by the thyroid gland and is essential for normal growth and development. Thyroxin helps to regulate the body’s metabolism by increasing the rate at which cells use oxygen and glucose. This helps to increase the production of energy and the breakdown of carbohydrates. Thyroxin also helps to regulate the body’s temperature and heart rate.
Parathyroid hormone is a hormone that regulates calcium and phosphorus levels in the blood. It is produced by the parathyroid glands, which are four small glands located in the neck. Parathyroid hormone helps to maintain a healthy balance of calcium and phosphorus in the blood by increasing the absorption of calcium from the intestines and the release of calcium from the bones. Parathyroid hormone also helps to increase the excretion of phosphorus in the urine.
Estrogen is a hormone that is produced by the ovaries. It is responsible for the development of female secondary sexual characteristics, such as the growth of breasts and the development of a feminine body shape. Estrogen also plays a role in the regulation of the menstrual cycle and in the maintenance of pregnancy.
Parathyroid hormone and estrogen do not regulate carbohydrate metabolism.