If more blue than red is used, which colour will be formed?

Correct answer: Blue-violet

The governing concept is hue direction in a two-colour mixture. Red and blue form violet; when blue is present in the greater amount, the violet shifts toward blue and becomes blue-violet. Hence option C is correct. Yellow-green requires yellow and blue, red-orange requires red and yellow, and light yellow is not produced by mixing a dominant blue with red.