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': 'For diagnosing chronic hypertension in pregnancy, hypertension is present prior to what gestational age \nSelect and explain. \nA. 8 weeks, B. 14 weeks, C. 20 weeks, D. 24 weeks', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Presence of hypertension prior to 20 weeks is suggestive of chronic hypertension in pregnancy.', 'role': 'assistant'}]