Antigen is a substance which
- lowers body temperature
- destroys harmful bacteria
- triggers the immune system
- is used as an antidote to poison
Explanation
Option (c) is correct
- An antigen is any foreign substance that enters the body and is recognized by the immune system as non-self, thereby stimulating an immune response. Antigens are typically present on the surface of pathogens such as bacteria, viruses, fungi, or other foreign particles like toxins and pollen. When an antigen enters the body, it is detected by immune cells such as lymphocytes, which respond by producing specific antibodies to neutralise or eliminate the antigen
