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': 'A 20 year old female is diagnosed to have molar pregnancy. All of the following are features of paial mole, EXCEPT: \nSelect and explain. \nA. Fetus is present, B. Amnion is present, C. Karyotype is usually 69 XXY, D. Greater risk of persistent trophoblastic disease', 'role': 'user'}, {'content': 'Answer: D \nExplanation: In a case of paial mole there is only 1-5% risk of development of persistent trophoblastic disease. There is a 15-20% risk for developing this in cases of complete mole. Features of paial mole are: Karyotype is usually 69,XXX or 69,XXY Fetus, amnion and fetal red blood cells are often present Villous edema could be focal or diffuse Trophoblastic proliferation could be variable 1-5% risk of developing persistent trophoblastic disease Ref: Cunningham F.G., Leveno K.J., Bloom S.L., Hauth J.C., Rouse D.J., Spong C.Y. (2010). Chapter 11. Gestational Trophoblastic Disease.', 'role': 'assistant'}]