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Assertion : 2.5 mum or less than 2.5 mum...

Assertion : 2.5 `mu`m or less than 2.5 `mu`m size of SPM is harmful for health.
Reason : Large particles are filtered by nasal cavity & throat

A

(a) If both assertion and reason are true and reason is the correct explanation of assertion.

B

(b) If both assertion and reason are true but reason is not the correct explanation of assertion.

C

(c) If assertion is true but reason is false.

D

(d) If both assertion and reason are false.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to analyze the assertion and the reason provided. ### Step 1: Understand the Assertion The assertion states that "2.5 µm or less than 2.5 µm size of SPM is harmful for health." - **Explanation**: SPM stands for suspended particulate matter, which includes tiny particles that can be inhaled into the lungs. Particles that are 2.5 micrometers or smaller can penetrate deep into the respiratory system and cause various health issues, such as respiratory diseases and cardiovascular problems. Therefore, this assertion is **true**. ### Step 2: Understand the Reason The reason states that "Large particles are filtered by the nasal cavity & throat." - **Explanation**: Larger particles, typically those greater than 10 micrometers, are indeed filtered out by the nasal cavity and throat due to the body's natural defense mechanisms, such as mucous and cilia. This statement is also **true**. ### Step 3: Determine the Relationship Now we need to determine if the reason explains the assertion. - The assertion talks about the harmful effects of smaller particles (≤2.5 µm), while the reason discusses the filtration of larger particles. Although both statements are true, the reason does not explain why the smaller particles are harmful. Therefore, the reason does not provide a justification for the assertion. ### Conclusion - **Assertion**: True - **Reason**: True - **Does the reason explain the assertion?**: No ### Final Answer The correct option is that both the assertion and reason are true, but the reason does not explain the assertion. ---
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