Which statement is correct about the thyroid gland?
- AThyroid hormones are essential for the early development and maturation of the central nervous system
- B$T3 \;and \;T4$ stimulate the secretion of $TSH$ by the anterior pituitary
- CPeople who have an over active thyroid gland have a low $BMR$
- DLow plasma levels of thyroid hormones leads to thyrotoxicosis
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