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': 'True about complete mole: \nSelect and explain. \nA. Presence of foetal pas and cardiac activity, B. Normal uterine size, C. Beta-hCG doubling time is 7-10 days, D. Preeclampsia at <24 weeks', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Uterine size usually more Theca lutein cyst -common Medical complications- common Serum beta hcg-very high Persistent GTD-20%; local invasion is 15% and metastasis 5%(refer pgno:169 sheila obstetrics 2 nd edition)', 'role': 'assistant'}]