This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Radiology
Most probable diagnosis on this barium film is 
Select and explain. 
A. Lymphoma, B. Brucellosis, C. TB, D. Crohn's disease
D: Crohn's disease
Answer: D: Crohn's disease 
Explanation: Features on barium small bowel follow-through in Crohn&;s disease include:mucosal ulcersaphthous ulcers initiallydeep ulcers (>3 mm depth)longitudinal fissurestransverse stripeswhen severe leads to cobblestone appearancemay lead to sinus tracts and fistulaewidely separated loops of bowel due to fibrofatty proliferation (creeping fat) thickened folds due to oedemapseudodiveicula formation: due to contraction at the site of ulcer with ballooning of the opposite sitestring sign: tubular narrowing due to spasm or stricture depending on the chronicitypaial obstructionon control films presence of gallstones, renal oxalate stones, and sacroiliac joint or lumbosacral spine changes should be soughtSource: