Which pigment pair is more suitable for producing vivid violet?

Correct answer: Bluish red and reddish blue

Violet is made by combining red and blue pigments. For a vivid result, the red should lean toward blue or violet and the blue should lean toward red or violet, so unwanted yellow or green influence is minimised. Option B is correct. Orange- or yellow-biased pigments introduce yellow, which is complementary to violet and can lower saturation; the other pairs do not provide the appropriate combination.