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: Surgery
[{'content': 'Protein bound iodine measures secretory function of thyroid in all of the following circumstances except \nSelect and explain. \nA. Nephrotic syndrome, B. Following hemithyroidectomy, C. During ampicillin therapy, D. Asthamatics on ephedrine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]