Pneumonia is an infection that primarily affects the ____A______. The leading cause of pneumonia is bacteria such as ____B____ and ____C____.
What is the most suitable combination of options to fill the blanks in the statement about pneumonia?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → A–lungs, B–Streptococcus pneumoniae, C–Haemophilus influenzae
Pneumonia is a bacterial disease that infects the alveoli (air-filled sacs) of the lungs. The alveoli fill with fluid, which causes severe problems in breathing. The bacteria named for it are Streptococcus pneumoniae and Haemophilus influenzae. So the blanks read A – lungs, B – Streptococcus pneumoniae, C – Haemophilus influenzae.
The other choices do not fit. Pneumonia is not a disease of the kidney, blood or heart. Salmonella typhi causes typhoid, an infection of the small intestine. Wuchereria is not a bacterium; it is the filarial worm that causes elephantiasis.
NCERT Extract:
Common Diseases in Humans – “… Bacteria like Streptococcus pneumoniae and Haemophilus influenzae are responsible for the disease pneumonia in humans which infects the alveoli (air filled sacs) of the lungs. As a result of the infection, the alveoli get filled with fluid leading to severe problems in respiration.”