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': 'All of the following constitute familial cancer syndrome except - \nSelect and explain. \nA. Xeroderma-pigmentosum, B. Retinoblastoma, C. Neurofibromatosis, D. MEN-I', 'role': 'user'}, {'content': 'Answer: A \nExplanation: All are familial cancer syndromes.\nXeroderma-pigmentosa is autosomal recessive, defective DNA repair syndrome.\nOther three are autosomal dominant inherited cancer syndrome.\nAmongst the given options best answer is a i.e. xeroderma pigmentosa because autosomal dominant inherited cancer syndromes are the most common type of genetically predisposed cancer.', 'role': 'assistant'}]