In the following question, out of the given four alternatives, select the alternative which best expresses the meaning of the Idiom/Phrase. Cry in the wilderness
In the following question, the sentence given with blank to be filled in with an appropriate word. Select the correct alternative out of the four and indicate it by selecting the appropriate option.
According to Central Pollution Control Board (CPCB), particulate size _______ micrometers or less in diameter are responsible for causing the greatest harm to human health.