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Cretinism is caused by a deficiency of ....................

  • A.Iron
  • B.Zinc
  • C.Iodine
  • D.Selenium

Answer: C

Cretinism is caused by a deficiency of iodine.

Iodine is needed to make the thyroid hormones T3 and T4. Severe iodine deficiency in the mother during pregnancy, or in early infancy, deprives the developing brain and skeleton of thyroid hormone and causes cretinism: intellectual disability, stunted growth, deaf-mutism and coarse features. Universal salt iodisation is the preventive measure.

Iron deficiency causes anaemia, zinc deficiency causes growth failure and poor wound healing, and selenium deficiency is linked with Keshan disease.

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