If yellow-orange is placed beside red-orange how may yellow-orange appear?

Correct answer: Relatively lighter and slightly less warm

The governing concept is relative colour temperature within a neighbouring hue family. Red-orange usually carries a stronger red warmth, so yellow-orange placed beside it may seem relatively lighter and slightly less warm by comparison. Option B is correct. It does not become blue, neutral or violet; the colour itself remains yellow-orange, but perception changes because the adjacent red-orange provides a warmer reference point.