This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mycology, Subject name: Microbiology
Stain which differentiates cryptococcus from other fungus 
Select and explain. 
A. Gram stain, B. Acid fast stain, C. India ink, D. Gomori methamine silver stain
C: India ink
Answer: C: India ink 
Explanation: India ink or Nigrosine - demonstrate the capsule of Cryptococcus as a clear halo Gram stain - used to diff. b/w gram positive and gram negative Acid fast stain - used to stain Tuberculous bacteria, acid fastness is due to mycolic acid . Gomori methamine silver stain - used to stain Pneumocystis jiroveci