<prompt> A 50 year old male presented with recurrent bloody diarrhea. Colonoscopy showed geographical ulcers. Histopathology is shown below. What is your diagnosis?Pseudomebranous colitisNon-hodgkin lymphoma colonAdenocarcinoma colonCrohn disease  <response>: Ans. d Crohn diseaseRef: R 9 798The picture shows - transmural inflammation blue part and a overlying ulcer. The best option here is Crohns disease. 