This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
[{'content': 'Adverse effect of tocolytic agonist in pregnancy: \nSelect and explain. \nA. Pulmonary edema, B. Arrythmia, C. 1K+, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans is a, b and c i.e.', 'role': 'assistant'}]