This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Anatomy
Reticulocytes are stained by 
Select and explain. 
A. Methylviolet, B. Brilliant cresyl blue, C. Sudan black, D. Indigo carmine
B: Brilliant cresyl blue
Answer: B: Brilliant cresyl blue 
Explanation: Ref Robbins 9/e p635 Reticulocytes are stained in living state in-vitro so staining with dyes like brilliant cresyl blue and new methylene blue is preferred road supra vital staining Brilliant cresyl blue is a supravital stain used for counting reticulocytes. It is classified as an oxazine dye