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': "Hypothyroidism with increased TSH level is seen in All Except \nSelect and explain. \nA. Sheehan's syndrome, B. Lithium carbonate therapy, C. Post radioiodine ablation, D. Endemic goitre", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Sheehan’s syndrome causes hypopituitarism leading to decreased TSH.', 'role': 'assistant'}]