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Mathc the following Columns. {:("Colum...

Mathc the following Columns.
`{:("Column I","Column II"),("A. World Environment Day","1. 2nd December"),("B. World Ozone Day","2. 29th December"),("C. National Pollution Prevention Day","3. 16th September"),("D. Biological Diversity Day","4. 5th June"):}`

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