<prompt> Cobblestone appearance seen on colonoscope is cheracteristic of the following diseaseCrohns diseaseUlcerative colitisTB colitisIrritable bowel syndrome  <response>: .in crohn;s disease,Fibrosis, stricture formation, deep ulcers, oedema of mucosa between ulcer areas which looks like cobble stone, skipped normal areas in between, serosal opacity, mesen-teric fat stranding, enlarged mesenteric lymph nodes, abscesses in the mesentery, fistula are the pathology. Small mucosal aphthous ulcers are earliest gross feature. ref:SRB;s manual of surgery,ed 3,pg no 800 