The following are multiple choice questions (with answers) about medical knowledge.   **Question:** On abdominal ultrasound gallbladder shows diffuse wall thickening with hyperechoic nodules at neck and comet tail aifacts. The most likely diagnosis will be:   (A) Adenomyomatosis   (B) Adenocarcinoma of gallbladder   (C) Xanthogranulomatous cholecystitis   (D) Cholesterol crystals
['(A) Adenomyomatosis <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Adenomyomatosis \n (B) Adenocarcinoma of gallbladder \n (C) Xanthogranulomatous cholecystitis \n (D) Cholesterol crystals <> possible answers', '  On abdominal ultrasound gallbladder shows diffuse wall thickening with hyperechoic nodules at neck and comet tail aifacts. The most likely diagnosis will be: <> context@']