Which one of the following pairs of organs includes only the endocrine glands?

Options

(a) Parathyroid and Adrenal
(b) Pancreas and Parathyroid
(c) Thymus and Testes
(d) Adrenal and Ovary

Correct Answer:

Parathyroid and Adrenal

Explanation:

Parathyroid and adrenal are the endocrine glands. Adrenal glands are pairs of endocrine glands  situated immediately above the kidneys. Hence they are also known as suprarenal glands. Parathyroid glands are the two pairs of endocrine glands situated behind or embedded within, the thyroid gland in higher vertebreates. They produce parathyroid hormone, which controls the amount of calcium in the blood.