Which colour is generally formed by mixing red and yellow acrylic colours?

Correct answer: Orange

The governing concept is the subtractive mixing of primary pigments. In the traditional school colour model, red and yellow are primary colours, and combining them produces orange, a secondary colour. The exact shade can vary with pigment strength and proportions, but it remains in the orange range. Green requires yellow and blue, violet requires red and blue, and blue is not formed by this pair. Therefore option A is correct.