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: Psychiatry
[{'content': 'MC side effect of lithium: March 2003 \nSelect and explain. \nA. Polyuria, B. Fine tremors, C. Polydipsia, D. Weight gain', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B i.e. Fine tremors', 'role': 'assistant'}]