With reference to various diseases and their causing agents, consider the following pairs:
| Disease | Causing agents |
|
1. Avian Influenza |
Parasites |
|
2. Tuberculosis |
Bacteria |
|
3. Polio |
Bacteria |
|
4. Kala Azar |
Virus |
How many pairs given above is/are correctly paired?
1
Only one pair
2
Only two pairs
3
Only three pairs
4
All the four above