NEET 2022 Zoology question on Human Health and Disease

1. A.
   Primary response is produced when our body encounters a pathogen for the first time.
2. B.
   Anamnestic response is elicited on subsequent encounters with the same pathogen.
3. C.
   Anamnestic response is due to memory of first encounter.
4. D.
   Acquired immunity is non-specific type of defense present at the time of birth.

[NEET 2022]