Ploughed field’s remains have been found in which place?

Option A is correct because Kalibangan was the first Harappan site to have evidence of ploughed field remains.

Option B is incorrect because Ahar was a site of copper tools production.

Option C is incorrect because Chandravati was a site that has evidence of forts and buildings.

Option D is incorrect because Mohenjo Daro is the Harappan site with the first evidence of the Great Bath and urban civilization and not rural agriculture traces.