What change occurs when white is mixed with the primary colour yellow?

Correct answer: It becomes a lighter tint

Adding white to a hue creates a tint. Therefore, mixing white with primary yellow increases its lightness and produces a pale or lighter yellow, while the basic yellow hue remains recognisable. Black would make the colour darker and create a shade; green and violet require different colour mixtures and are not formed merely by adding white. Consequently, option B is correct.