Which colours lie on either side of yellow-orange on the colour wheel?

Correct answer: Yellow and orange

Yellow-orange is a tertiary colour formed between yellow, a primary colour, and orange, a secondary colour. Consequently, its position on the colour wheel is between yellow and orange, so option A is correct. Red and yellow are associated with the region around red-orange, while yellow-green lies between yellow and green. The named components identify the neighbouring positions of a tertiary colour.