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: Pediatrics
[{'content': 'The karyotype of a patient with Androgen Insensitivity Syndrome is: \nSelect and explain. \nA. 46XX, B. 46XY, C. 47XXY, D. 45X0', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Androgen Insensitivity Syndrome is the largest single entity that leads to 46, XY undermasculinization. AIS is divided into three categories that are differentiated by the degree of genital masculinization: Complete Androgen Insensitivity Syndrome (CAIS) is indicated when the external genitalia is that of a normal female, Mild Androgen Insensitivity Syndrome (MAIS) is indicated when the external genitalia is that of a normal male, and Paial Androgen Insensitivity Syndrome (PAIS) is indicated when the external genitalia is paially, but not fully masculinized. Ref:Kligman, Behrman, Jenson, Stanton (2008), Chapter 589, "Disorders of Sex Development", In the book, "Nelson\'s Textbook of Pediatrics", Volume 2, 18th Edition, New Delhi, Page 1164', 'role': 'assistant'}]