Toward which colour will orange shift when more yellow is used?

Correct answer: Toward yellow

Orange is a secondary colour made by mixing red and yellow. If more yellow is added, yellow forms the larger proportion of the mixture, so the hue becomes more yellowish and shifts toward yellow. It would move toward red only if additional red were used. Blue and violet are not the expected directions because neither is being added. Thus option A is correct. The governing idea is that a mixed colour is biased toward the component present in greater quantity.