This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pregnancy induced Hypeension, Subject name: Gynaecology & Obstetrics
[{'content': 'Magnesium sulphate toxicity include all EXCEPT \nSelect and explain. \nA. Loss of Patellar reflex, B. Oliguria, C. Respiratory depression, D. Cardiac arrest', 'role': 'user'}, {'content': 'Answer: B \nExplanation: MgSo4 acts by inhibition of neuromuscular transmission. NOTE: we monitor urine output while patient is on MgSO4, not because it is a sign of MgSO4 toxicity, but because oliguria is secondary to PIH (glomerular endotheliosis) and decreased urine output would decrease MgSO4 clearance and increase risk of toxicity. Serum Mg2+ levels(meq/l) Clinical effects 4-7 Normal therapeutic level 8 - 10 Patellar reflex disappear 10-15 Respiratory depression 12-15 Respiratory paralysis 25 - 30 Cardiac arrest', 'role': 'assistant'}]