Esophageal carcinoma is not  predisposed by: (A) Achalasia, (B) Scleroderma, (C) Corrosive intake, (D) barrett's oesophagus
Answer is B. common predispositions in developing carcinoma oesophagus includes,
*human papillomavirus infection
*achalasia cardia (30%)
*oesophageal webs (25%)
*Barrett's oesophagus and also Plummer Vinson syndrome, tylosis, corrosive strictures, and nitrosamines.