This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
[{'content': 'Which of the following is associated with hypothyroidism Is sub Himalayan region? \nSelect and explain. \nA. Cu, B. Fe, C. Zinc, D. Selenium', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Answer is option 4 Selenium Hypothyroidism in Himalayan region is associated with iodine deficiency and selenium deficiency. Selenium forms pa of seleno-enzyme responsible for conveing T4 to T 3 . In Himalayan areas alps andes flooded river areas are deficient with iodine and it is fuher worsened by selenium deficiency.', 'role': 'assistant'}]