<prompt> Malignant transformation is commonly seen in:Stomal ulcerGastric ulcerChronic duodenal ulcerPostbulbar ulcer  <response>: Ans. b Gastric ulcer Malignant transformation is very rarely seen in gastric ulcer 1 - Not so common. Giant gastric ulcer 2cm is associated with cancer in 6-15 cases Of the above choices we can opt for choice B only - but it is not so common. 