Which diseases are transmitted by mosquitoes?

Mosquitoes are known vectors for various diseases, particularly those caused by parasites and viruses. In the case of the diseases mentioned, malaria and lymphatic filariasis are both transmitted by mosquitoes. Malaria is caused by Plasmodium parasites, which are transmitted to humans through the bite of infected Anopheles mosquitoes. Lymphatic filariasis is caused by filarial worms, primarily Wuchereria bancrofti, which are also spread through mosquito bites, particularly from species like Culex mosquitoes.

The other options contain diseases that are not transmitted by mosquitoes. Cryptosporidiosis and ascariasis, for instance, are commonly associated with water contamination and fecal-oral transmission, rather than through insect vectors. Amoebic dysentery is primarily transmitted through contaminated food or water, while pinworms are typically spread through direct contact, not by mosquitoes. Therefore, the correct choice accurately reflects the diseases specifically associated with mosquito transmission.