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: Pathology
[{'content': 'The following diseases have a defect in DNA repair mechanism except for \nSelect and explain. \nA. Xeroderma pigmentosum, B. Huntington’s disease, C. Fanconi syndrome, D. Hereditary non polyposis colon cancer', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Inherited autosomal recessive syndromes of defective DNA repair\nAtaxia Telangiectasia\nBloom syndrome\nFanconi anaemia\nXeroderma pigmentosum\nHereditary Nonpolyposis cancer\nHuntington’s disease is an example of trinucleotide repeat disorders', 'role': 'assistant'}]