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
All are risk factors for CA GB except 
Select and explain. 
A. Adenomyosis, B. ABPDJ, C. Gallstones, D. Adenomatous polyps
A: Adenomyosis
Answer: A: Adenomyosis 
Explanation: 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