Assertion(A): Gambusia is a fish which is being introduced into the ponds to check vector-borne diseases.
Reason(R): AIDS is a vector-borne disease.
Correct answer: (c) Assertion(A) is true and reason(R) is false.
The diseases which spread by vectors are called vector-borne diseases.
Most common vector-borne diseases like malaria, dengue and chikungunya are caused by mosquitoes.
Such diseases can be controlled by preventing the breeding of mosquitoes.
One such method is the introduction of fish like Gambusia that feed on mosquito larvae into stagnant water.
AIDS is not a vector-borne disease, it is spread mostly through bodily fluids.
Here, the assertion is true, but the reason is false.