National Deworming Day is observed in our country India to reduce the cases of worm infections among kids, on 10th February every year. It was observed for the first time in 2015.
Smallest particles of matter are known as quarks and leptons that seem to be the fundamental building blocks. This is too small to measure but bigger than 0. This is ofen consider as fundamental building blocks and something even smaller.
In the following question, out of the four alternatives, select the alternative which best expresses the meaning of the idiom/phrase. Barking up the wrong tree
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