Which of the following is the Grassman s law equation?

• A. Y = 0.30 R + 0.59 B + 0.11 G
• B. Y = 0.30 G + 0.59 R + 0.11 B
• C. Y = 0.30 R + 0.59 G + 0.11 B
• D. Y = 0.30 B + 0.59 G + 0.11 R