Correct option is D
Correct Answer:D. Iron
The Harappan Civilization (also known as the Indus Valley Civilization) was one of the earliest urban cultures in the world, flourishing around 2600 to 1900 BCE.
Archaeological findings at various Harappan sites have revealed the use of several metals:
Copper: Used extensively for making tools, weapons, and ornaments.
Gold: Found in jewelry and decorative items.
Silver: Used for ornaments, jewelry, and trade.
Iron, however, has not been found in significant quantities at any Harappan site, and it was likely not in use during the peak of the civilization.
Iron Use: Iron was later introduced in India, much after the decline of the Harappan civilization. The use of iron became more prominent during the Vedic period (around 1200 BCE onwards), marking the beginning of the Iron Age in India.
The Harappans were skilled in copper metallurgy, and evidence of advanced copper smelting and alloying (including bronze) has been found at their sites.