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What forms the basis of color theory?

  1. Red, Orange, Violet, Blue

  2. Red, Orange, Yellow, Green, Blue, Violet

  3. Red, Blue, Green, Yellow

  4. Blue, Green, Red, Violet

The correct answer is: Red, Orange, Violet, Blue

The correct answer is A: Red, Orange, Violet, Blue. Color theory is based on the color wheel, which consists of three primary colors (red, blue, yellow), three secondary colors (orange, green, violet), and six tertiary colors. In this question, the answer choice A includes the primary and secondary colors that form the basis of color theory. It omits yellow because yellow is a primary color, not a secondary color, making it the correct choice in this context.