This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gestational Trophoblastic Disease, Subject name: Gynaecology & Obstetrics
[{'content': 'Hydatidiform mole is principally a disease of: \nSelect and explain. \nA. Amnion, B. Chorion, C. Uterus, D. Decidua', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is b, i.e. ChorionRef. Dutta 7/e, p 190Now don't tell me you want me to explain this--H mole is a benign neoplasm of chorion with malignant potential", 'role': 'assistant'}]