This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mood Disorders, Subject name: Psychiatry
[{'content': 'A bipolar disorder patient is kept on lithium therapy. As a doctor when are you going to ask the nurse to get serum lithium levels checked ? \nSelect and explain. \nA. Immediatly as soon as the last dose given, B. 12 hours after the last dose, C. 24 hours after the last dose, D. 8 hrs after the last dose', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Lithium has been found to decrease both suicide attempts and completed suicides in a patient with bipolar disorder. Extra edge : Only antipsychotic with antisuicide propey : Clozapine', 'role': 'assistant'}]