The correct answer is option 'D' - None of the above.

Rural settlements refer to the areas where people live in the countryside, away from urban centers. These settlements are characterized by their spatial arrangement and pattern. They can vary based on factors such as topography, climate, culture, and historical development. The three patterns mentioned in the options - star pattern, rectangular pattern, and circular pattern - are commonly observed in different types of rural settlements. Let's discuss each pattern in detail to understand why the correct answer is 'D' - None of the above.

1. Star pattern:
The star pattern of rural settlement is characterized by a central point or a focal point from which roads or paths radiate outward in different directions, resembling the shape of a star. This pattern is often found in areas where transportation routes converge or where there is a central market or administrative center. The roads or paths act as the arms of the star, connecting different parts of the settlement with the central point. This pattern allows for easy access and movement within the settlement.

2. Rectangular pattern:
The rectangular pattern of rural settlement is characterized by a grid-like arrangement of streets or paths that intersect at right angles, forming rectangular blocks. This pattern is commonly observed in planned settlements or areas that have been developed systematically. The rectangular layout provides a sense of order and organization to the settlement. It allows for efficient land use and facilitates navigation within the settlement.

3. Circular pattern:
The circular pattern of rural settlement is characterized by a central point or a focal point around which houses or other structures are arranged in a circular or semi-circular shape. This pattern is often found in areas with physical or cultural factors that influence settlement formation. For example, in hilly or mountainous regions, settlements may take the form of circular terraces following the contour lines. In some cases, cultural or religious beliefs may also influence the circular arrangement of settlements.

Therefore, the correct answer is 'D' - None of the above, as all the mentioned patterns - star pattern, rectangular pattern, and circular pattern - can be observed in various types of rural settlements.