A water sample has ppm level concentration of following anions
`F^(-)=10 , SO_(4)^(2-)=100 , NO_(3)^(-) =50`
the anion/anions that make/makes the water sample unsuitable for drinking is/are

Options

A. only `NO_(3)^(-)`
B. both `SO_(4)^(2-)` and `NO_(3)^(-)`
C. only `F^(-)`
D. only `SO_(4)^(2-)`

Answer

C