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. Pen
B. Calculator
C. Pencil
D. Ink

Answer

To solve the problem of identifying which item does not belong to the group, we will analyze the four options provided: pen, calculator, pencil, and ink.

### Step-by-Step Solution:

1. **Identify the Options**:
- Option 1: Pen
- Option 2: Calculator
- Option 3: Pencil
- Option 4: Ink

2. **Analyze Each Option**:
- **Pen**: A pen is a writing instrument used to write or draw with ink.
- **Calculator**: A calculator is a device used to perform mathematical calculations.
- **Pencil**: A pencil is also a writing instrument used to write or draw, typically with graphite.
- **Ink**: Ink is a liquid used for writing or printing, often used with pens.

3. **Group Similar Items**:
- The pen, pencil, and ink are all related to writing. They are tools or materials used to produce written text.
- The calculator, on the other hand, is not a writing instrument but rather a tool used for mathematical operations.

4. **Determine the Odd One Out**:
- Since the pen, pencil, and ink are all used for writing, while the calculator is used for calculations, the calculator does not belong to the same group.

5. **Conclusion**:
- Therefore, the item that does not belong to the group is **Option 2: Calculator**.