Multiple choice

Mycobacterium is an acid-fast bacteria. It can be stained with

  1. Auramine O

  2. Triarylmethane dyes

  3. Aluminon

  4. Aniline Blue WS

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A Correct answer
Explanation

Auramine O can be used to stain acid-fast bacteria (e.g. Mycobacterium), where it binds to the mycolic acid in its cell wall) in a way similar to Ziehl-Neelsen stain. It can also be used as a fluorescent version of Schiff reagent.