This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Gynaecology & Obstetrics
[{'content': 'Theca-lutein cysts are characteristic of \nSelect and explain. \nA. Ectopic pregnancy, B. Molar pregnancy, C. Missed aboion, D. Preeclampsia', 'role': 'user'}, {'content': "Answer: B \nExplanation: The ovaries contain multiple theca-lutein cysts in 25 to 60 percent of women with a complete mole. These likely result from overstimulation of lutein elements by sometimes massive amounts of hCG.Because theca-lutein cysts regress following pregnancy evacuation, expectant management is preferredReference: William's Obstetrics; 25th edition, chapter 20; Gestational trophoblastic diseases", 'role': 'assistant'}]