A. Thyroid
B. Parathyroid
C. Adrenal medulla
D. A and B
Submitted by: Abid Hussain
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The parathyroid glands are a group of four glands neighboring the thyroid gland that are the main regulators of the blood calcium in your body. Parathyroid glands release parathyroid hormone (PTH) which increases your blood calcium levels.
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