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

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertin is true but reason is false.
D. If both assertion and reason are false.

Answer

**Step-by-Step Solution:**

1. **Understanding the Assertion**: The assertion states that *Streptococcus pneumoniae* and *Haemophilus influenzae* are responsible for causing infectious diseases in humans.
- *Streptococcus pneumoniae* is known to cause pneumonia, while *Haemophilus influenzae* can lead to various diseases, including pneumonia, bacteremia, epiglottitis, and bacterial meningitis.

2. **Understanding the Reason**: The reason provided explains how a healthy person can acquire the infection, specifically through inhaling droplets or aerosols released by an infected person.
- This mode of transmission is known as droplet infection, which is common for respiratory pathogens.

3. **Evaluating the Assertion**: Both bacteria mentioned in the assertion are indeed known pathogens that cause infectious diseases in humans. Therefore, the assertion is correct.

4. **Evaluating the Reason**: The reason accurately describes the transmission method for these infections. A healthy individual can become infected by inhaling respiratory droplets from an infected person, which is a well-documented route of transmission for respiratory diseases.

5. **Conclusion**: Since both the assertion and reason are correct, and the reason provides a valid explanation for the assertion, we conclude that both statements are true and the reason correctly explains the assertion.

**Final Answer**: Both the assertion and reason are correct, and the reason is the correct explanation for the assertion.

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