What may be the purpose of adding a small amount of orange to blue?

Correct answer: To mute the blue

The governing concept is complementary colour neutralisation in pigment mixing. Orange is opposite blue on the traditional colour wheel, so a small amount of orange counteracts blue’s intensity and produces a softer, muted blue or slightly neutralised mixture. Option A is correct. The mixture does not transform blue into yellow or white, and adding a complement reduces purity rather than increasing it. The result depends somewhat on pigment strength and proportion.