According to the Central Pollution Control Board, particles that are responsible for causing great harm to human health are of diameter

Options

A. 2.50 micrometers
B. 5.00 micrometers
C. 10.00 micrometers
D. 7.5 micrometers.

Answer

A

Explanation

Particulate matter causing air pollution is differentiated into settleable (larger than `10 mu` m) and suspended (less than `10 mu` m) particulate matteer. According to Central Pollution Control Board, particles of `2.5 mu` and lesser diameter are most harmful to human health as they can pass deep into lungs causing breathing and respiratory problems.