When a pathogen enters the blood, the immune system uses a range of mechanisms to destroy it. The diagram illustrates one such mechanism. Which row identifies the structures involved?
- Astructure X: antigen; X is made by lymphocytes; structure Y: antibody
- Bstructure X: antigen; X is made by phagocytes; structure Y: antibody
- Cstructure X: antibody; X is made by lymphocytes; structure Y: antigen
- Dstructure X: antibody; X is made by phagocytes; structure Y: antigen