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': 'Clozapine therapy should be stopped when WBC count falls lower than \nSelect and explain. \nA. 3000 / mm3, B. 1500 / mm3, C. 2000 / mm3, D. 1000 / mm3', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Clozapine can lead to agranulocytosis and hence therapy should be stopped if WBC count falls below 3000\xa0/ mm3\xa0or neutrophil count falls below 1500\xa0/ mm3.', 'role': 'assistant'}]