Assertion : The effects of particulate pollutants are largely dependent on the particle size.
Reason : Air borne particles such as dust , fumes , mist etc., are dangerous for human health .

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 c orrect explanation of assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false.

Answer

b

Explanation

The effect of particulate pollutants are largely dependent on the particle size as the particulate pollutants bigger than 5 microns are likely to lodge in nasal passage whereas, particles of about 1.0 micron enter into lungs easily .