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Comment upon the following : People l...

Comment upon the following :
People living in hilly regions usually suffer from simple goitre.

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In hilly regions, soil is deficient in iodine. People thus have deficiency of iodine in their diet. Deficiency of iodine causes thyroid gland to enlarge in effort to produce more hormone.
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ICSE-SAMPLE PAPER 2011-SECTION-II
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