This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous system, Subject name: Pharmacology
All are true about Clozapine except 
Select and explain. 
A. More potently blocks D2 as compared to D1 receptors, B. Blood level below 350 ng/ml should be maintained to avoid agranulocytosis, C. Should not be used along with Carbamazepine, D. Should be discontinued if the WBC count is below 3,000/ .' mm cells
B: Blood level below 350 ng/ml should be maintained to avoid agranulocytosis
Answer: B: Blood level below 350 ng/ml should be maintained to avoid agranulocytosis 
Explanation: side effects are sedation, unstable BP, tachycardia, urinary incontinence, weight gain and precipitation of diabetes. Few cases of myocarditis have been repoed which sta like flu but may progress to death. Clozapine is used as a reserve drug in resistant schizophrenia. Its mechhanism as follows Ref: KD TRIPATHI 8TH ED.