Which statement about color theory is true?

The statement about color theory that is true is that the color wheel contains the color red-violet, which is not one of the colors of the rainbow, which are red, orange, yellow, green, blue, indigo, and violet. As you can see, there is no red-violet color there. A is incorrect because light splits into fewer colors. B is incorrect because red, yellow, and blue cannot be formed, green can be formed by mixing blue and yellow.