Question

Match List-I with List-II 

List-I (Disease)		List-II (Vector/Transmission Agent)
A	Malaria	I	Female Anopheles
B	Filariasis	II	Culex and Aedes
C	Dengue	III	Female Aedes
D	Encephalitis	IV	Culex and Aedes

Choose the correct answer from the options given below:

• (A) - (III), (B) - (II), (C) - (I), (D) - (IV)
• (A) - (I), (B) - (II), (C) - (III), (D) - (IV)
• (A) - (I), (B) - (II), (C) - (IV), (D) - (III)
• (A) - (III), (B) - (IV), (C) - (I), (D) - (II)

Hint:

To solve vector matching questions quickly, use two well-known associations:
- Malaria is always transmitted by female Anopheles mosquitoes.
- Dengue is always transmitted by female Aedes mosquitoes.
Matching these two instantly leads to the correct option.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Many insect-borne diseases rely on specific mosquito vectors for transmission.
Identifying which mosquito genus transmits a given pathogen is essential for vector control and public health management.

Step 2: Detailed Explanation:
Let us analyze each disease and its corresponding vector:
- (A) Malaria: This disease is caused by protozoan parasites of the genus Plasmodium.
It is transmitted to humans through the bites of infected female mosquitoes of the genus Anopheles. Thus, (A) matches (I).
- (B) Filariasis: Lymphatic filariasis (elephantiasis) is caused by parasitic filarial nematodes such as Wuchereria bancrofti.
These worms are transmitted by several mosquito species, primarily within the genera Culex (such as Culex quinquefasciatus) and Aedes. Thus, (B) matches (II).
- (C) Dengue: Dengue fever is caused by the dengue virus, a flavivirus.
It is transmitted primarily by female mosquitoes of the genus Aedes, particularly Aedes aegypti and Aedes albopictus. Thus, (C) matches (III).
- (D) Encephalitis: Various forms of viral encephalitis, such as Japanese Encephalitis or West Nile Encephalitis, are transmitted by mosquitoes.
The primary vectors belong to the genus Culex (such as Culex tritaeniorhynchus), along with some Aedes species. Thus, (D) matches (IV).
Combining these matches gives: (A) - (I), (B) - (II), (C) - (III), (D) - (IV).
This sequence matches Option (B).

Step 3: Final Answer:
The correct matches are Malaria with female Anopheles, Dengue with female Aedes, and both Filariasis and Encephalitis with Culex and Aedes vectors.
This corresponds to Option (B).