A student says that green is always a secondary colour. What is the correct evaluation?

Correct answer: It is correct only in the traditional pigment system

Colour classification depends on the medium and its mixing model. In the traditional RYB or pigment classroom model, green is made by mixing yellow and blue, so it is treated as a secondary colour. In additive RGB light, however, green is one of the three primary lights. Thus option B is correct; the word “always” makes option A false, while C and D are also inaccurate.