This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
[{'content': 'The most common presentation of endemic goiter is \nSelect and explain. \nA. Hypothyroid, B. Diffuse goiter, C. Hypehyroid, D. Solitary nodule', 'role': 'user'}, {'content': "Answer: B \nExplanation: Answer is B (Diffuse Goiter) : 'Euthyroid state is generally the rule' - Robbins Endemic goiter :occurs in geographical areas where the soil, water and food supply contains only low levels of iodine. The lack of the iodine leads to decreased synthesis of thyroid hormones and a compensatory increase in TSH, which in turn leads to follicular cell hyperophy and hyperplasia and goitrous enlargement - Diffuse hyperplastic goitre. 'Euthyroid state is generally the rule' 'Rare patients are hypehyroid'", 'role': 'assistant'}]