Peptic ulcer is caused by

Mycobacterium tuberculosis

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Helicobacter pylori

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Salmonella typhi

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Escherichia coli

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Solution

The correct option is B Helicobacter pylori
Peptic ulcer causes pain and bleeding in the stomach and duodenum. It is caused by a bacteria called Helicobacter pylori. Robin Warren and Barry Marshall were the scientists who identified that this bacteria causes the disease.

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