The formation of a goiter is indicative that your blood does
     The formation of a goiter is indicative that your blood does not contain enough I^-, which is necessary for the production of  Prolactin  thyroid hormone  Parathyroid hormone  Thymopoietins  calcitonin 
  
  Solution
Hi,
Answer is b.thyroid hormones.
Explanation:
I hope my answer is satisfactory.
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