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
False about GB polyps 
Select and explain. 
A. Adenomyomatosis <1 cm, pedunculated, B. Cholesterol polyps are most common, C. Symptomatic polyps are indication for cholecystectomy, D. Polyp with stone is an increased risk of malignancy
A: Adenomyomatosis <1 cm, pedunculated
Answer: A: Adenomyomatosis <1 cm, pedunculated 
Explanation: Polypoid lesions of the gallbladder Cholesterol Polyps They are most common Usually <10mm in size Have a characteristic echogenic pedunculated appearance on USG Multiple (30% of cases) Adenomatous polyp Adenomatous polyp has malignant potential. Adenoma may be difficult to distinguish from adenocarcinoma of GB Main differentiating feature is a lack of transmural invasion on USG Risk factors associated with malignancy Age >60 years Documented increase in size Coexistence of gallstones Size >10mm Ref:Sabiston 20th edition Pgno :1510