The odd one among the following is

Options

A. square
B. rectangle
C. triangle
D. cube

Answer

To determine the odd one out among the given shapes: square, rectangle, triangle, and cube, we can analyze each shape based on their dimensions.

### Step-by-Step Solution:

1. **Identify the Shapes**: We have four shapes: square, rectangle, triangle, and cube.

2. **Classify the Shapes**:
- **Square**: A square is a two-dimensional (2D) shape with equal length and width.
- **Rectangle**: A rectangle is also a two-dimensional (2D) shape, but it has unequal length and width.
- **Triangle**: A triangle is another two-dimensional (2D) shape with three sides.
- **Cube**: A cube is a three-dimensional (3D) shape that has length, width, and height.

3. **Compare Dimensions**:
- The square, rectangle, and triangle are all 2D shapes. They can be represented on a flat surface and have only two dimensions (length and width).
- The cube, on the other hand, is a 3D shape. It has three dimensions (length, width, and height) and cannot be represented on a flat surface without losing its volume.

4. **Conclusion**: Since the cube is the only shape that is three-dimensional while the others are two-dimensional, it is the odd one out.

### Final Answer:
The odd one among the following is **cube**.