Question : How did the discovery of the Harappan civilization challenge previous notions of ancient Indian history?
Option 1: By proving the existence of an advanced urban culture
Option 2: By disproving the theory of the Aryan supremacy
Option 3: By revealing the use of iron in ancient India
Option 4: By showing the influence of Greek architecture in ancient India
Correct Answer: By proving the existence of an advanced urban culture
Solution : The discovery of the Harappan civilization challenged previous notions of ancient Indian history by proving the existence of an advanced urban culture, which was previously unknown and altered our understanding of the region's historical timeline.