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: Pharmacology
[{'content': 'Ergometrine is not used for initiation of labour because - \nSelect and explain. \nA. Show onset of action, B. Fetal hypoxia, C. Increases blood pressure, D. Act on D2 receptors to cause vomiting', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Fetal hypoxia", 'role': 'assistant'}]