Choose the quadrilateral in which all the four sides are not equal.

Options

A. Rhombus
B. Square
C. Rectangle
D. None of these

Answer

To solve the question of choosing a quadrilateral in which all four sides are not equal, we will analyze the properties of different types of quadrilaterals.

### Step-by-Step Solution:

1. **Understand the Types of Quadrilaterals**:
- A quadrilateral is a four-sided polygon. There are various types of quadrilaterals, such as squares, rectangles, rhombuses, and trapezoids.

2. **Examine the Rhombus**:
- A rhombus has all four sides equal. Therefore, it does not meet the requirement of having unequal sides.
- **Conclusion**: Rhombus = All sides equal.

3. **Examine the Square**:
- A square also has all four sides equal. Thus, it does not meet the requirement either.
- **Conclusion**: Square = All sides equal.

4. **Examine the Rectangle**:
- A rectangle has two pairs of equal sides. The lengths of opposite sides are equal, but the lengths are not equal to the breadth. Therefore, all four sides are not equal.
- **Conclusion**: Rectangle = Two pairs of equal sides, not all sides equal.

5. **Examine Other Quadrilaterals (if applicable)**:
- Other quadrilaterals like trapezoids or irregular quadrilaterals can also have sides that are not equal. However, based on the options given, we focus on the rectangle.

6. **Final Answer**:
- The quadrilateral in which all four sides are not equal is the **rectangle**.