Human cheek cells are stained witha. Methylene Blueb. safraninc. Acetocarmined. Eosin

To solve this question, let's first understand the purpose of staining and the types of stains mentioned:

Human cheek cells are typically stained to make the cell structures more visible under a microscope. Different stains are used to highlight various parts of the cells.

Methylene Blue: Methylene blue is a basic dye, commonly used to stain the cell's nucleus. It stains the nucleus a deep blue color, making it easier to see the structure of the cell.

Safranin: Safranin is a red dye, often used in plant cell staining, but it is not the most common stain for human cheek cells.

Aceto-carmine: Aceto-carmine is another stain used to highlight the chromosomes during cell division. It is not commonly used for routine cheek cell staining.

Eosin: Eosin is an acidic dye that stains the cytoplasm of cells, usually turning it a pinkish color. It is more commonly used in conjunction with other stains like hematoxylin.

Out of the options provided, methylene blue is the most commonly used stain for human cheek cells as it effectively stains the nucleus, allowing for easy observation.

Answer: a. Methylene Blue