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: Physiology
[{'content': 'The principle of "Wolff-chaikoff effect" is used in \nSelect and explain. \nA. Iodide for thyrotoxic patients after surgery, B. Iodide for thyrotoxic patients before Surgery, C. Stimulation of hormone synthesis, D. Inereased vascularity of thyroid gland', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Increased Iodine inhibits thyroid hormone synthesis. This is called Wolff Chaikoff effectRef: Ganong&;s review of medical physiology; 24th edition; page no; 346', 'role': 'assistant'}]