What is the primary stain and what does it do. How do the gram-positive and gram-negative cells react?
a) Crystal violet, stains both gram-positive and gram-negative cells purple
b) Safranin, stains gram-positive cells pink and gram-negative cells purple
c) Crystal violet, stains gram-positive cells purple and gram-negative cells pink
d) Methylene blue, stains both gram-positive and gram-negative cells blue