Three of the following four are alike in a certain way and so form a group. Which is the one that does not belong to that group ?

Options

A. Blue
B. Red
C. Yellow
D. Pink

Answer

To solve the problem, we need to identify which of the four options does not belong to the group based on their characteristics.

### Step-by-Step Solution:

1. **Identify the Options**: The four options given are:
- Option 1: Blue
- Option 2: Red
- Option 3: Yellow
- Option 4: Pink

2. **Classify the Colors**:
- **Primary Colors**: Blue, Red, and Yellow are known as primary colors. These colors cannot be created by mixing other colors.
- **Secondary Color**: Pink is not a primary color; it is created by mixing red and white.

3. **Analyze the Grouping**:
- The first three options (Blue, Red, and Yellow) are all primary colors.
- The fourth option (Pink) is a secondary color, which is formed by mixing other colors.

4. **Determine the Odd One Out**:
- Since Blue, Red, and Yellow are all primary colors and form a group, while Pink does not fit this classification, Pink is the one that does not belong to the group.

5. **Conclusion**: The option that does not belong to the group is Option 4: Pink.

### Final Answer:
The correct answer is Option 4: Pink.