Which is not considered a complication of peptic ulcers? A. hemorrhage B. obstruction C. perforation D. gangrene

Answer 1

http://heartburn.about.com/cs/articles/a/UlcerComplicate.htm

Answer 2

Probably d. Gangrene is the death of tissue due to lack of blood supply. With ulcers there usually isn't this type of problem because it affects mucous membranes and gangrene affects limbs and digits.