This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Gynaecology & Obstetrics
[{'content': 'All the following are to be monitored during Magnesium sulfate prophylaxis in impending eclampsia Except \nSelect and explain. \nA. Patellar reflex, B. Respiratory Rate, C. Urine output, D. Serum magnesium level', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Magnesium sulfate toxicity:Therapeutic levels: 4-5meq/lThe first sign of impending toxicity: 8-10meq/l Deep tendon reflexes should be presentRespiratory depression or paralysis: 12meq/l Respiratory rate: >14breaths/min; Pulse oximetry: >96%Urine output: at least 30ml/hrFetal side effects : loss of fetal muscle tone and lethargyRef: William&;s Obstetrics; 24th edition; Chapter 40', 'role': 'assistant'}]