Which secondary colour is obtained by mixing yellow and blue primary colours?

Correct answer: Green

In the traditional RYB pigment model, mixing two primary colours produces a secondary colour. Yellow combined with blue produces green. The other pairings help distinguish the distractors: red plus blue gives violet, red plus yellow gives orange, and red-orange is a tertiary colour rather than the direct result of yellow and blue. Therefore, option B is the only correct answer for this pigment-mixing calculation.