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': 'Xeroderma pigmentosum is characterized by \nSelect and explain. \nA. AutosomaL dominant inheritance, B. Inability to repair sunlight induced damage to DNA, C. Irregular accumulation of melanin in the basal cell layer, D. Acanthosis of epithelium with elongation of rete ridges', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Xeroderma pigmentosum is a genetically determined disorder, in which defective DNA repair mechanisms lead to chronic UV damage and subsequent development of different sun related skin tumors, including melanoma, in sun exposed areas.', 'role': 'assistant'}]