In which of the following quadrilaterals opposite sides are not parallel ?

Options

A. A)Rectangle
B. B)Parallelogram
C. C)Rhombus
D. D)Kite

Answer

To solve the question "In which of the following quadrilaterals are opposite sides not parallel?", we will analyze each option provided.

### Step-by-Step Solution:

1. **Understanding Quadrilaterals**: A quadrilateral is a four-sided polygon. The properties of different types of quadrilaterals vary, particularly concerning the parallelism of their sides.

2. **Analyzing Each Option**:
- **Option A: Rectangle**
- A rectangle has opposite sides that are equal and parallel. Therefore, this does not satisfy the condition of having opposite sides that are not parallel.

- **Option B: Parallelogram**
- A parallelogram also has opposite sides that are equal and parallel. This option does not meet the requirement either.

- **Option C: Rhombus**
- A rhombus has all four sides equal, and like the rectangle and parallelogram, it has opposite sides that are parallel. Thus, this option is also not correct.

- **Option D: Kite**
- A kite has two pairs of adjacent sides that are equal, but its opposite sides are not equal and are not parallel. This satisfies the condition of having opposite sides that are not parallel.

3. **Conclusion**: Based on the analysis, the quadrilateral in which opposite sides are not parallel is the **kite**.

### Final Answer:
The correct answer is **Option D: Kite**.

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