This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genetics, Subject name: Pathology
[{'content': 'Males who are sexually underdeveloped with rudimentary testes and prostate glands, sparse pubic and facial hair, long arms and legs and large hands and feet are likely to have the chromosome complement of: \nSelect and explain. \nA. 45, XYY, B. 46, XY, C. 47, XXY, D. 45, X0', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Klinefelter syndrome. Extra X chromosome, so they are 47 XXY or 46XY/47 XXY mosaics. Male phenotype Hypogonadism | Secondary sexual characteristics Dispropoionately long arms and legs.', 'role': 'assistant'}]