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
[{'content': 'Reticulocytes are stained by \nSelect and explain. \nA. Methylviolet, B. Brilliant cresyl blue, C. Sudan black, D. Indigo carmine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 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', 'role': 'assistant'}]