Math the following Columns.  `{:("Column I","Column II"),("A.  Eutrophication","1.
Channel: Doubtnut
Date: 2020-05-24

Math the following Columns.  `{:("Column I","Column II"),("A.  Eutrophication","1.  Rise in sea level"),("B.  Biomagnification","2.  Water hyacinth"),("C.  Terror of Bengal","3.  Increase of quantity of pollutant at successive trophic levels"),("D.  Greenhouse effect","4.  Enrichment with nutrients"):}`