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': 'In a case of vesicular mole, all of following are high risk factors for the development of choriocarcinoma, EXCEPT: \nSelect and explain. \nA. Serum HCG levels>1,00,000 mIu/ml, B. Uterus size larger than 16 week, C. Features of thyrotoxicosis, D. Presence of bilateral theca lutein cysts of ovary', 'role': 'user'}, {'content': 'Answer: B \nExplanation: High risk factors which indicates the development of choriocarcinoma at the time of diagnosis of a hydatidiform mole are: Maternal age more than 40 years Excessive uterine enlargement Serum hCG levels more than 100,000mIU/ml Theca lutein cysts greater than 6 cm in diameter Toxemia, hypehyroidism and coagulopathy Trophoblastic embolization Previously treated choriocarcinoma Ref: A Practical Approach to Gynecologic Oncology By Basu page 142.', 'role': 'assistant'}]