What is the colour called when red is dominant in a red and orange mixture?

Correct answer: Red-orange

The governing concept is naming a tertiary colour according to the dominant component. When red and orange are mixed and red has the stronger influence, the resulting hue is called red-orange, so option B is correct. Yellow-orange would show stronger yellow influence, and red-violet requires violet rather than orange as the neighbouring colour. “Orange-yellow” is not the standard name needed for this red-dominant red-orange mixture.