This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Labour - normal, abnormal, malposition, malpresentation and their management, Subject name: Gynaecology & Obstetrics
[{'content': 'All of the following are used for induction of labour, EXCEPT \nSelect and explain. \nA. PG F2atablet, B. PG E1 tablet, C. PG E2 gel, D. Oxytocin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: PG F2a causes a tonic uterine contraction and is unsuitable for a induction of labor as a tonic contraction can cause fetal hypoxia. However, the tonic action on the uterus is put to good use in causing 12 to 20 weeks aboions. This is also an excellent drug for PPH control when the regular drugs fail to act', 'role': 'assistant'}]