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': 'Drug of choice for medical termination of pregnancy in a second gravida with asthma at 16 weeks gestation is : \nSelect and explain. \nA. Prostaglandin, B. Ethacridine lactate, C. Hypeonic saline, D. Intra-amniotic dexamethasone', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Hypeonic saline', 'role': 'assistant'}]