Correct option is D
- The stomach produces hydrochloric acid (HCl) to aid in digestion. It plays a crucial role in breaking down food and activating enzymes such as pepsin, which helps in digesting proteins.
- Hydrochloric acid also helps maintain an acidic pH in the stomach, which is essential for killing harmful bacteria and pathogens ingested with food.
Information Booster:
- Nitric acid (HNO₃): This strong acid is not produced in the stomach but is used in various industrial applications, including fertilizers and explosives.
- Sulphuric acid (H₂SO₄): Another strong acid, widely used in industry for manufacturing chemicals, and not present in the human digestive system.
- Perchloric acid (HClO₄): A highly corrosive and strong acid, used in laboratory and industrial settings, not involved in digestion.