According to Central Pollution Control Board (CPCB), particulate size _______ micrometers or less in diameter are responsible for causing the greatest harm to human health.
In each of the questions, four alternatives are given for the Idiom/Phrase. Choose the alternative which best expresses the meaning of the Idiom/Phrase and click the button corresponding to it.
In the following question, out of the four alternatives, choose the word which is opposite in meaning to the given word and click the button corresponding to it.