Match the following lists :
| List-I | List-II |
|---|---|
| P.Bacteria | 1.Entamoeba histolytica |
| Q.Virus | 2.Ancylostoma duodenale |
| R.Protozoa | 3.Hepatovirus A |
| S.Helminths | 4.Salmonella typhosa |
Select the correct answer using the code given below :
- A4 3 2 1
- B4 3 1 2Correct
- C2 3 1 4
- D1 3 2 4
Solution
Concept
Water-borne pathogens
Step-by-step solution
1. Bacteria: Salmonella typhosa (typhoid) → 4. 2. Virus: Hepatovirus A (hepatitis A) → 3. 3. Protozoa: Entamoeba histolytica (amoebic dysentery) → 1. 4. Helminths: Ancylostoma duodenale (hookworm) → 2.
Explanation
Pathogens in water belong to four groups: bacteria, viruses, protozoa and helminths (worms). Each has typical examples.
Why the other options are wrong
The other codes assign protozoa to helminths or bacteria to a protozoan.
Shortcut
Salmonella = bacteria; hepatovirus = virus; Entamoeba = protozoa; Ancylostoma = worm.
Common mistake
Mixing protozoa with helminths.
Correct answer: B) 4 3 1 2