AIIMS 2019 Zoology Air Pollution Assertion Reason Question
The assertion statement is true that ‘small particulate matter of size 2.5μm or less is harmful for health. The reason statement is also true that ‘nasal cavity and throat filters most of the large particles’, but it is not the correct explanation for assertion.
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Assertion is correct but Reason is incorrect
Both Assertion and Reason are incorrect
Correct Answer
Detailed Explanation
Option B is correct because the assertion accurately states that particulate matter (PM₂.₅) poses health risks due to its ability to penetrate deep into the respiratory system, while the reason correctly identifies that larger particles are filtered by the nasal cavity and throat. However, the reason does not explain why PM₂.₅ is harmful, as it pertains to smaller particles that bypass these filters.
Option A is incorrect because, although both statements are true, the reason does not explain the assertion. Option C is incorrect since both statements are true, and option D is incorrect because both statements are valid. Understanding the health implications of PM₂.₅ and the body's filtration mechanisms is crucial for recognizing air quality's impact on health.
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