This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Management and Long-Term Consequences, Subject name: Gynaecology & Obstetrics
[{'content': "First sign of magnesium sulphate toxicity is? \nSelect and explain. \nA. Loss of deep tendon reflexes, B. Respiratory depression, C. Cardiac arrest', D. Decrease urinary output", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. (a) Loss of deep tendon reflexesRef : William's 23ed e. p-738", 'role': 'assistant'}]