Given below are two statements. In the light of the above statements, choose the most appropriate answer from the options given below.
Statement I:RSPM are those suspended particulate matters (SPM) whose aerodynamic diameter is more than 10 micron.
Statement II:Fine particles are those SPM whose aerodynamic diameter is less than 2.5 micron.
ABoth Statement I and Statement II are correct
BBoth Statement I and Statement II are incorrect
CStatement I is correct but Statement II is incorrect
DStatement I is incorrect but Statement II is correct ✓ Correct
Correct answer: (D) Statement I is incorrect but Statement II is correct
Explanation
Statement 1 is incorrect: RSPM are respirable particles with aerodynamic diameter less than 10 micron, not more.
Statement 2 is correct: fine particles have aerodynamic diameter below 2.5 micron.
Respirable particles are small enough to reach deep into the lungs.
Larger particles above 10 micron are mostly trapped in the upper airways.
The first statement reverses the size limit while the second is accurate.
RSPM corresponds to PM10 and fine particles to PM2.5 in monitoring.
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