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Which condition involves stunted physical, mental, and sexual development in children due to insufficient thyroid hormone production?

1. A condition where growth in children is impaired due to low thyroid hormone levels.
2. A genetic disorder causing thick, salty mucus to obstruct the respiratory system.
3. A disorder caused by reduced synthesis of either α or β chains in hemoglobin.
4. A genetic condition linked to the X chromosome, resulting in defective blood clotting.

Correct answer: A condition where growth in children is impaired due to low thyroid hormone levels.

Solution

Low thyroid hormone in childhood causes cretinism, which leads to stunted physical growth and delayed mental and sexual development. The correct option matches this description by linking impaired growth to insufficient thyroid hormone levels.

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