Identify the wrong matched pair.

Options

A. Typhoid - Widal test
B. Plague - Viral disease
C. Malignant malaria - Plasmodium falciparum
D. Common cold - Rhinovirus

Answer

To solve the question of identifying the wrong matched pair, we will analyze each pair given in the context of the diseases and their causative agents.

### Step-by-Step Solution:

1. **Understand the First Pair: Typhoid and Vital Test**
- Typhoid fever is caused by the bacterium *Salmonella typhi*.
- The test used to detect this bacterium is known as the Widal test.
- This pair is correctly matched.

2. **Analyze the Second Pair: Plague and Viral Disease**
- Plague is caused by the bacterium *Yersinia pestis*.
- It is not a viral disease; it is a bacterial infection.
- This pair is incorrectly matched.

3. **Evaluate the Third Pair: Malignant Malaria and Plasmodium falciparum**
- Malignant malaria is indeed caused by *Plasmodium falciparum*, which is a protozoan parasite.
- This pair is correctly matched.

4. **Examine the Fourth Pair: Common Cold and Rhinoviruses**
- The common cold is primarily caused by rhinoviruses.
- This pair is also correctly matched.

5. **Conclusion: Identify the Incorrect Pair**
- After evaluating all pairs, the only incorrect match is the second pair: Plague with Viral Disease.

### Final Answer:
The wrong matched pair is **Plague with Viral Disease**.

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