Which of these endocrine glands is present in the greatest number?

Which of the following are not the effects of Parathyroid hormone $(PTH)$?
$(a)$ Stimulates the process of bone resorption
$(b)$ Decreases $Ca^{2+}$ level in blood
$(c)$ Reabsorption of $Ca^{2+}$ by renal tubules
$(d)$ Decreases the absorption of $Ca^{2+}$ from digested food
$(e)$ Increases metabolism of carbohydrates
Choose the most appropriate answer from the options given below:

The number of parathyroid glands present on the back side of the thyroid gland is

Which of the following pairs of hormone and its associated disease is correct?

Calcium level decreases in the blood due to hyposecretion of

In humans,the removal of the parathyroid gland results in: