_______ is a disease which is transmitted by the Aedes mosquito which lays eggs in water-logged places and multiply over time.

Dengue

The correct answer is Option (3)- Dengue

Out of the diseases you listed, the one transmitted by the Aedes mosquito which lays eggs in stagnant water is:Dengue

• Dengue is a mosquito-borne viral infection that causes flu-like symptoms. The Aedes mosquito, particularly Aedes aegypti, is the primary carrier of the dengue virus. This mosquito thrives in tropical and subtropical climates and breeds in stagnant water sources.

Here's a quick comparison of the other diseases:

• Diarrhoea: Can be caused by various factors, including bacteria, viruses, parasites, or contamination. Not transmitted by mosquitoes.
• Elephantiasis: Caused by lymphatic filariasis, a parasitic infection spread by mosquitoes. However, different mosquito species (Culex) transmit this disease compared to Dengue.
• Malaria: Another mosquito-borne disease, transmitted by Anopheles mosquitoes.