| A. | thymus |
| B. | bone marrow |
| C. | spleen |
| D. | lymph nodes |
| E. | Peyer's patches |
| 1. | E, A, B only | 2. | C, D, E only |
| 3. | B, C, D only | 4. | A, B, C only |
Identify the wrong statement with a reference to immunity.
| 1. | When ready-made antibodies are directly given, it is called “Passive immunity". |
| 2. | Active immunity is quick and gives a full response. |
| 3. | Foetus receives some antibodies from the mother, it is an example of passive immunity |
| 4. | When exposed to antigen(living or dead) antibodies are produced in the host's body. It is called "Active immunity |