If more yellow than blue is used, which type of green is formed?

Correct answer: Yellow-green

The governing concept is hue bias caused by unequal proportions. Blue and yellow normally mix to make green, but using more yellow shifts the mixture toward the yellow side of the colour wheel. The resulting colour is generally yellow-green, so option D is correct. Dark blue-green would show blue dominance, violet-green is not the expected result of only blue and yellow, and grey-green would require dulling or neutralising the mixture.