The Rock Garden in Chandigarh is a unique example of:

Sculpture art
Mughal architecture
Modern landscaping
Botanical garden

The correct answer is: c) Modern landscaping.

The Rock Garden is a sculpture garden in Chandigarh, India, designed by Nek Chand Saini, a government employee who started building it in his spare time in 1957. It is made of industrial and natural waste and is spread over 17 acres (7 ha). The garden is a unique example of modern landscaping and has been described as “a fantasy world of rocks, concrete, and recycled materials”.

Sculpture art is the branch of visual arts that involves the creation of three-dimensional artworks, such as sculptures, carvings, and mosaics. Mughal architecture is a style of Islamic architecture that flourished in the Indian subcontinent during the Mughal Empire (1526–1857). Modern landscaping is a style of landscape architecture that emerged in the 20th century. It is characterized by its use of natural materials, its emphasis on sustainability, and its integration of art and architecture. Botanical gardens are institutions that collect, cultivate, and study plants. They are often used for educational purposes and for the conservation of plant species.

The Rock Garden is not an example of sculpture art, Mughal architecture, or a botanical garden. It is a unique example of modern landscaping.