This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Medical & Surgical Illness Complication Pregnancy, Subject name: Gynaecology & Obstetrics
[{'content': 'A 25-year-old primigravida with 20 weeks of pregnancy has a first episode of a symptomatic bacteriuria. The risk of having pyelonephritis is: \nSelect and explain. \nA. No risk with first episode, B. 5%, C. 15%, D. 25%', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. is d, i.e. 25%Ref. Dutta Obs. 7/e, p 299Twenty-five percent of these women are likely to develop acute pyelonephritis, usually in third trimester, if left untreated.', 'role': 'assistant'}]