Match the following Columns.
`{:("Column I","Column II"),("A. Ek nino effect","1. Rio-de-Janeiro"),("B. Earth Summit","2. 1974"),("C. Amrita Devi","3. Global warming"),("D. Sunder Lal","4. 1731"):}`
A. `{:("A","B","C","D"),(1,2,4,3):}`
B. `{:("A","B","C","D"),(3,1,4,2):}`
C. `{:("A","B","C","D"),(3,4,1,2):}`
D. `{:("A","B","C","D"),(1,4,3,2):}`