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: Medicine
[{'content': 'Karyotype of testicular feminisation- \nSelect and explain. \nA. 45 XO, B. 47 XXY, C. 46 XY, D. 46 XXY', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]