Which secondary colour is produced by mixing red and blue?

Correct answer: Violet

In the traditional pigment colour wheel, red and blue are treated as primary colours. Their mixture produces violet, a secondary colour, so option A is correct. Blue mixed with yellow produces green, and red mixed with yellow produces orange. Yellow itself is a primary colour in this model, not the result of mixing red and blue. The result can vary slightly with particular pigments, but violet is the expected school-level answer.