In the Gram staining procedure, which of the following happens after washing off the iodine?

• A. The gram-positive bacteria becomes purple and the gram-negative becomes colorless.
• B. The gram-positive and gram-negative bacteria become colorless.
• C. The gram-positive and gram-negative bacteria become purple.
• D. The gram-positive bacteria becomes colorless and the gram-negative bacteria becomes purple.

Answer: (C)