An open sore in the stomach wall due mainly to the action of a bacterium,Helicobacter pylori,is A)pernicious anemia. B)heartburn. C)a hiatal hernia. D)an ulcer.

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An open sore in the stomach wall is commonly known as an ulcer. The leading cause of ulcers is Helicobacter pylori bacteria. Pernicious anemia is a condition where the red blood cells decrease in the body, heartburn is a burning sensation in the chest or upper part of the stomach, and a hiatal hernia is a condition where a part of the stomach pushes through the diaphragm into the chest.

An Open Sore in the Stomach Wall Due Mainly to the Action