Concept: Primary colours of light are the three additive colours that combine to produce white light.
Explanation:The primary colours of light are red, blue and green.
These are called additive primary colours.
When red, blue and green light are mixed together in equal amounts, they produce white light.
Cyan, magenta and yellow are secondary colours, formed by mixing two primary colours of light.
Therefore, the correct choice is the set containing red, blue and green.
Answer: A. Red, blue and green