66.According to the central pollution control board, particles that are responsible for causing great harm to human health are of diameter- a. 2.50 𝜇m b. 5.00 𝜇m c. 10.00 𝜇m d. 7.50 𝜇m
Option A. According to the Central Pollution Control Board (CPCB), particles of 2.5 micrometer and lesser diameter are most harmful to human health as they can pass deep into the lungs causing breathing and respiratory problems.
