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': 'The Karyotype of a complete mole is: \nSelect and explain. \nA. 46 XY, B. 46 XX, C. 69 XYY, D. 69 XXY', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Complete moles have a normal karyotype of 46XX in 90% of the cases, usually resulting from an empty ovum feilized by a single sperm with subsequent reduplication of its haploid set of chromosomes. In approximately 5%, the complete mole has a 46XY karyotype, which occurs when two sperms (one carrying an X chromosome and the other carrying a Y chromosome) feilize an empty ovum. The Karyotype of a incomplete or paial mole is 69 XYY or 69 XXY. Ref: Gynecological Cancer Management: Identification, Diagnosis and Treatment edited by Daniel Clarke-Pearson, John Soper, 2011, Chapter 14 ; Text Book of Obstetrics by D.C.Dutta, 6th edition, Page 194, Page 200.', 'role': 'assistant'}]