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Option 1: Bhabhar - This is the correct answer. Bhabhar is a narrow belt of land, approximately 8 to 16 km in width, that lies parallel to the slopes of the Shiwalik mountain range. It is formed by the deposition of pebbles and other coarse materials by the rivers coming down from the mountains. The porosity of the pebbles allows the water to percolate into the ground, resulting in the disappearance of the rivers in this region.
Option 2: Bhangar - This is incorrect. Bhangar refers to the older alluvial deposits found in the Gangetic plains, which are composed of clay, silt, and sand.
Option 3: Khadar - This is incorrect. Khadar refers to the newer alluvial deposits in the Gangetic plains, which are fertile and composed of fine silts and clay.
Option 4: Kankar - This is incorrect. Kankar is a type of limestone commonly found in the arid and semi-arid regions of India. It is not related to the deposition of pebbles by rivers.