Correct choice is (b) Safranin
Best explanation: Safranin is used in Gram’s staining procedure. If it is a Gram-negative bacteria, it stains red. If it is a Gram-positive bacteria, it stains purple. The safranin is a counterstain and is lighter than crystal violet. It does not disrupt the colouration in Gram-positive cells while it decolorizes Gram-negative cells.