How did the town planning and architecture of the contemporary Chalcolithic cultures (such as Ahar-Banas or Malwa) fundamentally differ from the Indus Valley Civilization?

Options:

• A: Chalcolithic settlements featured highly advanced underground drainage systems made of stone, whereas IVC used burnt bricks.
• B: Chalcolithic houses were exclusively multi-storeyed stone palaces, while IVC houses were single-storeyed mud huts.
• C: Chalcolithic settlements were completely nomadic with no permanent architectural structures.
• D: Chalcolithic cultures lacked the grid-iron layout, standardized burnt bricks, and systematic urban planning seen in the IVC, relying instead on circular or rectangular mud-brick/wattle-and-daub houses.

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