A water sample has ppm level concentration of the following metals : `Fe=0.2,Mn=5.0,Cu=3.0,Zn=5.0.` The metal that makes the water sample unsuitable for drinking is :

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

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

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