Solution
Correct Answer: Option A
Colour monitors use a combination of three primary colours - red, green, and blue - to create a wide range of colours. By mixing different amounts of these colours at different intensities and brightness levels, the monitor can display different hues and shades. This is known as the RGB colour model, which is commonly used in digital displays and screens. By using this method of colour mixing, colour monitors can produce highly realistic and vivid images on the screen.