How do we call the sores in the digestive tubes, usually accompanied by disintegration of tissue?

Question: How do we call the sores in the digestive tubes, usually accompanied by disintegration of tissue?

Options:

Fissure
Rupture
Hernia
Ulcer

Correct answer:

Ulcer

Other game answers:
Find the answers to guess the gif, logo quiz 2015, emoji puzzle and emoji nation.
You can find other questions and answers of trivia crack at triviacrackcheats.org (other languages are also available, for this game).