Which is the correct group of primary colours?

Correct answer: Red, yellow and blue

The governing concept is the traditional subtractive colour model used in school painting. Red, yellow, and blue are taught as the primary colours because they are treated as basic pigments from which secondary colours can be mixed. Thus, option A is correct. Orange, green, and violet are secondary colours, while black and white are commonly used for darkening and lightening rather than belonging to this primary-colour group.