Select the incorrect pair

Options

A. (a) Xenopsylla - Plague
B. (b) Culex - Malaria
C. (c) Glossina - Trypanosomiasis
D. (d) Aedes - Yellow fever

Answer

To solve the question of selecting the incorrect pair related to vectors and diseases, we will analyze each option provided in the question step by step.

### Step-by-Step Solution:

1. **Evaluate the first option: Xenopsila causes plague.**
- **Analysis:** Xenopsila, specifically Xenopsylla cheopis, is known as the rodent flea. It is indeed a vector for the plague, which is caused by the bacterium Yersinia pestis.
- **Conclusion:** This statement is **correct**.

2. **Evaluate the second option: Culex is a transmitter of Malaria.**
- **Analysis:** Culex mosquitoes are not the primary vectors for malaria. The correct vector for malaria is the female Anopheles mosquito. Malaria is caused by Plasmodium species.
- **Conclusion:** This statement is **incorrect**.

3. **Evaluate the third option: Glossina is a transmitter of Trypanosomiasis.**
- **Analysis:** Glossina, commonly known as the tsetse fly, is indeed a vector for Trypanosomiasis, which is caused by the Trypanosoma parasite.
- **Conclusion:** This statement is **correct**.

4. **Evaluate the fourth option: Aedes mosquito is a transmitter of yellow fever.**
- **Analysis:** The Aedes mosquito, particularly Aedes aegypti, is known to transmit yellow fever, which is caused by the yellow fever virus.
- **Conclusion:** This statement is **correct**.

### Final Conclusion:
After evaluating all the options, the only incorrect pair is:
- **Culex is a transmitter of Malaria.**

Thus, the answer is **B**.

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