The correct answer is: B. Yamuna-Ghaggar Plain
The Yamuna-Ghaggar Plain is the largest part of the Haryana state. It is a vast alluvial plain that is formed by the confluence of the Yamuna and Ghaggar rivers. The plain is characterized by its fertile soil and its flat topography. It is the most important agricultural region in the state and is home to a number of major cities, including Chandigarh, Panchkula, and Mohali.
The Aravali range in the South is a mountain range that runs along the southern border of Haryana. The range is composed of sandstone and granite and is home to a number of wildlife sanctuaries.
The Shivalik hills to the North-East are a mountain range that runs along the northern border of Haryana. The range is composed of sedimentary rocks and is home to a number of forests.
The Semi-desert sandy plain is a region of sand dunes and scrubland that is located in the northwestern part of Haryana. The region is characterized by its hot and dry climate and its sparse vegetation.