A nurse is reviewing the medical record of a male client who has schizophrenia and is taking clozapine. Which of the following findings should the nurse identify as a contraindication to the administration of clozapine?

Choice A reason: A WBC count of 1,300/mm³ indicates severe leukopenia, a contraindication for clozapine due to its risk of agranulocytosis. Low white cells increase infection risk, requiring immediate discontinuation or monitoring per FDA guidelines, making this the critical finding to identify. Choice B reason: Hemoglobin of 16 g/dL is within normal range (14-18 g/dL) and does not contraindicate clozapine use. Normal hemoglobin supports adequate oxygen transport, so this finding is unremarkable and incorrect for identifying a contraindication. Choice C reason: Fasting blood glucose of 124 mg/dL indicates mild elevation but is not a contraindication for clozapine, which may worsen glucose control. Monitoring is needed, but this level does not preclude use, making it incorrect. Choice D reason: Platelet count of 200,000/mm³ is normal (150,000-450,000/mm³) and does not contraindicate clozapine. Normal platelets ensure proper clotting, so this finding is not a concern for clozapine administration, making it incorrect.