Elephantiasis - Wuchereria bancrofti - infected water and food
Malaria - Plasmodium vivax - bite of male anopheles mosquito
Typhoid - Salmonella typhi - with inspired air
Pneumonia - Sreptococcus pneumoniae - droplet infection
The correct option is D. Pneumonia - Streptococcus pneumoniae - droplet infection.
Streptococcus pneumoniae is a gram-positive coccus. Pneumococcal pneumonia is caused by bacteria called Streptococcus pneumoniae. The route by which this organism is spread from human to human is in the form of aerosol droplets.