This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition and Health, Subject name: Social & Preventive Medicine
[{'content': 'Hypothyroidism is associated with deficiency of \nSelect and explain. \nA. Iron, B. Iodine, C. Zinc, D. Fluorine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) Iodine* Iodine deficiency leads to hypothyroidism which manifests as goiter.* Due to hypothyroidism, thyroid cells try to compensate it by hyperplasia and hypertrophy of thyroid gland cells (goiter).* Iron deficiency leads to Microcytic anemia (IDA).* Zinc deficiency may manifest with acrodermatitis enteropathica.* Fluorine deficiency/excess manifests with dental caries.Also KnowOptimum level of fluorine in drining water: -0.5 - 0.8 mg per litre.', 'role': 'assistant'}]