In the best carmine stain, glycogen appears as which color range?

• A. Glycogen pink to red; Nuclei blue
• B. Glycogen blue; Nuclei pink
• C. Glycogen green; Nuclei yellow
• D. Glycogen colorless; Nuclei red

Answer: (A)

Best carmine stains glycogen by producing a bright magenta to pink color in glycogen-rich granules, while a counterstain colors the nuclei blue to provide contrast. This combination makes glycogen stand out distinctly as pink-to-red against blue-stained nuclei, which is why the correct description is glycogen pink to red with nuclei blue. The other color schemes don’t reflect how this stain interacts with glycogen versus nuclear material.