28.According to CPCB, particulate size of ___ in diameter are responsible for causing the greatest harm to human health. A. 2.5 nanometers or less B. 2.5 metres or less C. 2.5 micrometers or less D. 1.5 nanometers or less
Option C According to the central pollution control board (CPCB) 2.5 particulate size in diameter (in micrometers) of the air pollutants is responsible for the greatest harm to human health
