Question

Which of the following is not a primary colour?

• A. Blue
• B. Red
• C. Green
• D. Yellow

Hint:

Remember: Primary colors are fundamental in creating other colors. In the RGB system, primary colors are Red, Green, and Blue, while in RYB, they are Red, Yellow, and Blue.

Answer 1

The Correct Option is C

Step 1: Understanding primary colours
- In the context of additive color mixing (like with light), the primary colors are Red, Green, and Blue (RGB). These colors cannot be created by mixing other colors and are considered fundamental in this system.
- In subtractive color mixing (like with pigments), the primary colors are Red, Yellow, and Blue (RYB).
Step 2: Analyzing the options
- (A) Blue: Blue is a primary color in both the RGB and RYB systems.
- (B) Red: Red is also a primary color in both systems.
- (C) Green: Green is a primary color in the RGB system, but not in the RYB system, which uses Yellow instead. However, when considering common primary colors in light, Green is a primary color.
- (D) Yellow: Yellow is a primary color in the RYB system but not in the RGB system.
Step 3: Conclusion
The correct answer is (C) Green, as it is the odd one out when considering the RYB system, which uses Yellow as a primary color instead.
\[ \boxed{\text{Correct Answer: (C) Green}} \]