This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
[{'content': 'The chromosomal karyotype in patau syndrome is \nSelect and explain. \nA. 47XX,+21, B. 46XX\\/47XX,+18, C. 45XX,der(14;21), D. 47XX,+13', 'role': 'user'}, {'content': 'Answer: D \nExplanation: TRISOMY 13: PATAU SYNDROME Incidence: 1 in 15,000 bihs Karyotypes: Trisomy 13 type: 47,XX, +13 Translocation type: 46,XX,+13,der(13;14)(q10;q10) Mosaic type: 46,XX/47,XX, +13 (Robbins Basic Pathology, 9 th edition. page : 238)', 'role': 'assistant'}]