This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urology, Subject name: Surgery
[{'content': 'Gene responsible for FAP is located at \nSelect and explain. \nA. Chromosome 5, B. Chromosome 8, C. Chromosome 15, D. Chromosome X', 'role': 'user'}, {'content': "Answer: A \nExplanation: Familial adenomatous polyp(FAP) is inherited as an autosomal dominant neoplastic condition (chromosome 5q21). It has a high potential for malignant transformation. It presents in younger age group- 15-20 yrs; equal in both sexes. It commonly involves the large intestine but can also occur in stomach, duodenum and small intestine. Reference : page 899 SRB's manual of surgery 5th edition", 'role': 'assistant'}]