<prompt> Colonic disease can be diagnosed by all exceptViual colonoscopyBa enemaBa swallowBa follow through  <response>: .Indications of Barium swallow Dysphagia due to motility disorder like achalasia cardia, diffuse oesophageal spasm. Dysphagia due to mechanical causes like carcinoma, benign strictures and neoplasms, external compression. Pharyngeal pouch and other diveicula. GORD .ref:SRB;s manual of surgery,ed 3,pg no 721 