Step 1: Understanding Primary Colours.
Primary colours are the foundational colours in colour theory. These colours cannot be created by mixing other colours together. The primary colours are:
- Red
- Blue
- Yellow
Step 2: Evaluating the Options.
- Option (1): Green is a secondary colour, formed by mixing yellow and blue.
- Option (2): Orange is a secondary colour, formed by mixing red and yellow.
- Option (3): Red is a primary colour, one of the foundational colours used to create other colours.
- Option (4): Violet is a secondary colour, formed by mixing red and blue.
Conclusion:
Therefore, the correct answer is (3) Red.