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': "Which of the following is an example of disorders of sex chromosomes ? \nSelect and explain. \nA. Marfan's syndrome, B. Testicular feminization syndrome, C. Klinefelter's syndrome, D. Down's syndrome", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]