An Abattoir presented with pustule on hand which turned into ulcer | PGI MCQs for MD MS Preparations

A person working in an abattoir presented with pustule on hand which turned into ulcer. Most probable diagnostic test would be
A. Trichrome methylene blue`
B. Carbol fuschin
C. Acid fast stain
D. Calcoflour white


Ans. A. Trichrome methylene blue