Question

Assertion (A): Streptococcus pneumoniae and Haemophilus influenzae are responsible for causing infectious disease in human beings.
Reason (R): A healthy person acquires the infection by inhaling the aerosols released by an infected person.

• A. Both (A) and (R) are true and (R) is the correct explanation of (A).
• B. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
• C. (A) is true, but (R) is false.
• D. (A) is false, but (R) is true.

Hint:

Streptococcus pneumoniae and Haemophilus influenzae are transmitted via respiratory droplets, but their disease-causing ability depends on their virulence factors.

Answer 1

The Correct Option is B

Step 1: Streptococcus pneumoniae and Haemophilus influenzae are bacteria that cause diseases like pneumonia and meningitis in humans, making Assertion (A) true.
Step 2: These infections can indeed be acquired by inhaling aerosols from an infected person, making Reason (R) true.
Step 3: However, (R) only describes the mode of transmission, not why these bacteria cause disease (e.g., their pathogenicity), so it does not explain (A).
Thus, both (A) and (R) are true, but (R) is not the correct explanation of (A).