Which of the following was not known to Indus Valley people?

Q. Which of the following was not known to Indus Valley people?
Answer: Iron
Notes: Variety of metals such as copper, gold, silver was extensively used by the Harappan metal workers. Minor metals like tin, arsenic, lead, antimony etc. were used for alloying but there was no mention of iron.

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📌 Question Number: 55 in 2. Indus Valley Civilization in the above course in App.