Explanation:

- Northern Mountains: These are characterized by high peaks, deep valleys, and heavy snowfall. They don't typically feature denuded rocks or stable elevated lands.

- Peninsular Plateau: This is your answer. This region is known for its stable, old, and rigid landforms. It features denuded rocks, series of scarps, and elevated terrains.

- Northern Plains: These are flat, fertile lands formed by the deposition of alluvial soil. They lack elevated terrains and rocky features.

- Coastal Plains: These are narrow flatlands near the ocean. They are characterized by sandy or clayey soil and proximity to sea levels, not elevated rocky features.