उत्तर भारतातील मैदानी प्रदेशाच्या कोणत्या गाळाच्या मैदानात हिमालयातून वाहात येणाऱ्या लहान नद्या विलुप्त होतात ?

The correct answer is Option D (Bhabar plain).

Key Points:
• Physiographic Belts of the Great Northern Plains:
• The Great Northern Plains of India are divided from north to south into four distinct geomorphic zones:
• 1. Bhabar: A narrow 8 to 10 km wide strip running parallel to the Shiwalik foothills composed of coarse pebbles, gravels, and unassorted rock debris. Because of exceptionally high rock porosity, small Himalayan streams and rivers sink underground and disappear from the surface in this belt.
• 2. Tarai: An adjacent marshy, damp, forested belt south of Bhabar where underground streams re-emerge to the surface.
• 3. Bhangar: Older, elevated alluvial terraces above flood limits containing calcareous nodules (Kankar).
• 4. Khadar: Newer, highly fertile flood-plain alluvium renewed annually by river floods.
• Key Takeaway: Small Himalayan streams disappear underground in the porous, pebble-rich Bhabar tract along the Shiwalik foothills.