What occurs to the gastrointestinal tract during iron poisoning?

Iron poisoning can lead to significant damage to the gastrointestinal tract. When high doses of iron are ingested, the corrosive nature of iron can cause irritation and necrosis in the tissues of the stomach and intestines. This damage manifests as gastrointestinal symptoms such as abdominal pain, vomiting, and potentially bleeding. The corroding effect of iron on the lining of the gastrointestinal tract is due to its oxidative properties, leading to inflammation and cellular damage. Thus, the correct answer highlights the serious impact iron poisoning has on these tissues.