Which of the following is a common result of acid poisoning in the human body?

Acid poisoning can lead to significant adverse effects on the body's tissues and organs, with damage to the stomach lining being a prominent consequence. When acids are ingested or come into contact with the mucosal lining of the gastrointestinal tract, they can cause corrosive injury. This may result in symptoms like abdominal pain, vomiting, and in severe cases, bleeding or perforation of the stomach.

The stomach lining, also known as the gastric mucosa, is particularly vulnerable due to its role in protecting underlying tissues from harsh acidic environments during digestion. In cases of acid poisoning, the protective mechanisms are overwhelmed, leading to inflammation and erosion of the lining.

In contrast, increased metabolism, visual impairment, and hair loss are not typical or direct outcomes of acid poisoning. While they may occur due to other types of poisonings or health issues, they do not correlate directly with the physiological effects of acid exposure in the gastrointestinal tract. Thus, stomach lining damage remains the most relevant and common result of acid poisoning.