This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Anatomy
[{'content': 'All are risk factors for CA GB except \nSelect and explain. \nA. Adenomyosis, B. ABPDJ, C. Gallstones, D. Adenomatous polyps', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Adenomyosis has no malignant potential Risk factors for Carcinoma Gallbladder Gallstones >3cm Procelain gallbladder Anomalous pancreaticobiliary junction (APBDJ) Choledochal cysts Adenomatous polyps Primary sclerosing cholangitis Obesity Salmonella typhi infection Ref: Sabiston 20th edition Pgno :1510', 'role': 'assistant'}]