1.

Match the following{:("List-I","LIst-II"),((A)NO_(3)^(-)" ion in drinking water 50 ppm causes decase","(1)Dis~olved oxygen water is greater than"),((B)SO_(4)^(-2)"ion is greater then 550ppm causes",(2)" Minamita disease"),((C)"Mercury poison causing",(3)"Laxative effect"),((D) "Domestic sewage",(4)"Blue boaby syndrome"):} The correct match is

Answer»

`{:(A,B,C,D),(1,2,3,4):}`
`{:(A,B,C,D),(4,3,1,2):}`
`{:(A,B,C,D),(3,4,2,1):}`
`{:(A,B,C,D),(4,3,2,1):}`

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