Correct answer:

(1) Congenital atresia. (2) Inflammatory stricture – secondary to reflux oesophagitis. (3) Caustic stricture. (4) Achalasia. (5) Plummer–Vinson syndrome with oesophageal web. (6) Pharyngeal pouch. (7) Tumour of the oesophagus or cardia (8) systemic sclerosis (scleroderma).