You are presented with the question "Where can antigens be found?" and the following answer choices: 
- Contaminated wounds
 - the environment
 - Most plants
 - our nearest star
 - Earth orbiting the Sun
 - Veins and arteries.
 - an area swollen with pus
 - skin melanoma cells

Now knowing that antigens are found on cancer cells and the cells of transplanted organs and cancerous melanoma Skin melanoma is one of the most cancerous skin cancers, choose the best answer.


 

        skin melanoma cells 