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: Pharmacology
[{'content': 'Lithium may produce: \nSelect and explain. \nA. Hypehyroidism, B. Hypothyroidism, C. Hyperparathyroidism, D. Hypoparathyroidism', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Hypothyroidism', 'role': 'assistant'}]