A ‘breath test’ used by traffic police to check drunken driving uses ____...? Mcqs

A ‘breath test’ used by traffic police to check drunken driving uses ____...?

(A) Turmeric on filter paper

(B) Silica gel coated with silver nitrate

(C) potassium permanganate-sulphuric acid

(D) Potassium dichromatic-sulphuric acid