The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A middle aged male patient presents with fever and diarrhea for 1 week and acute onset pain abdomen for 6 hours. An erect abdominal X-ray was taken as shown. What is the likely diagnosis?   (A) Pseudomembranous colitis   (B) Adenocarcinoma colon   (C) Pneumatosis intestinalis   (D) Toxic megacolon
['(D) Toxic megacolon <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Pseudomembranous colitis \n (B) Adenocarcinoma colon \n (C) Pneumatosis intestinalis \n (D) Toxic megacolon <> possible answers', '  A middle aged male patient presents with fever and diarrhea for 1 week and acute onset pain abdomen for 6 hours. An erect abdominal X-ray was taken as shown. What is the likely diagnosis? <> context@']