If a student writes orange for a mixture of yellow and blue, what is the correct answer?

Correct answer: Green

In the standard school colour wheel for paint, yellow and blue are primary colours. Their mixture produces the secondary colour green, so option A is correct. Orange is not produced by this pair; it results from mixing red and yellow. Violet results from red and blue, while red itself is a primary colour rather than the mixture being asked about. Thus the student’s label should be corrected to green.