The maximum permissible nitrites in public water supplies, is (A) Nil (B) 0.5 P.P.M. (C) 1.0. P.P.M. (D) 1.5 P.P.M

The maximum permissible nitrites in public water supplies, is 

(A) Nil 

(B) 0.5 P.P.M. 

(C) 1.0. P.P.M. 

(D) 1.5 P.P.M

by

1 Answer

Answer :

(A) Ni

by

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