(A) Potassium permanganate
(B) Sulphuric acid and napthamine
(C) Phenol-di -sulphuric acid potassium hydroxide
(D) None of these
(A) Potassium permanganate
(B) Sulphuric acid and napthamine
(C) Phenol-di -sulphuric acid potassium hydroxide
(D) None of these
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