Match the pairs of diseases and pathogens:
`{:("Column-I","Column-II"),(1." Malaria", a." Wuchereria bancrofti"),(2." Filariasis", b." Helminth"),(3." Typhoid", c." Plasmodium falciparum"),(4." Schistosomiasis", d." Salmonella typhi"):}`

Options

A. 1-c,b-b,3-a,4-d
B. 1-d,2-a,3-b,4-c
C. 1-a,2-a,3-c,4-d
D. 1-c,2-a,3-d,4-b

Answer

To match the pairs of diseases and pathogens, we will analyze each disease in Column-I and identify the corresponding pathogen from Column-II.

### Step-by-Step Solution:

1. **Identify the pathogen for Malaria:**
- Malaria is caused by the parasite **Plasmodium falciparum**.
- Therefore, we match **Malaria** with **c. Plasmodium falciparum**.

2. **Identify the pathogen for Filariasis:**
- Filariasis is caused by the parasite **Wuchereria bancrofti**.
- Thus, we match **Filariasis** with **a. Wuchereria bancrofti**.

3. **Identify the pathogen for Typhoid:**
- Typhoid fever is caused by the bacterium **Salmonella typhi**.
- Hence, we match **Typhoid** with **d. Salmonella typhi**.

4. **Identify the pathogen for Schistosomiasis:**
- Schistosomiasis is caused by a type of **Helminth** (specifically, it is caused by trematodes).
- Therefore, we match **Schistosomiasis** with **b. Helminth**.

### Final Matches:
- 1. Malaria → c. Plasmodium falciparum
- 2. Filariasis → a. Wuchereria bancrofti
- 3. Typhoid → d. Salmonella typhi
- 4. Schistosomiasis → b. Helminth

### Answer Code:
- 1 → c
- 2 → a
- 3 → d
- 4 → b