A) thyroid gland
B) pituitary gland
C) parathyroid gland
D) adrenal gland
Correct Answer: A
Solution :
The retarded mental and physical development is associated with hyposecretion of \[{{T}_{3}}\] and \[{{T}_{4}}\] which causes cretinism. It is disease of infaia, called cretins. It is characterized by decreased BMR, stunted growth, retarded mental development so low IQ, delay puberty, coarse dry skin etc. Cretinism can be congenital(absence of thyroid due to genetic defect) or endemic (absence of iodine in diet). It can be corrected by thyroxin administration.
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