Explanation
Why Correct: Mehrgarh in Balochistan, Pakistan (7000-2500 BCE) provides the earliest evidence of settled agriculture in the Indian subcontinent, with domesticated wheat, barley, and cattle dating to 5500-4800 BCE.
Distractor Analysis: Harappa and Mohenjo-daro were major urban centers of the mature Indus Valley Civilization (2600-1900 BCE), which developed after the Neolithic agricultural phase. Kalibangan was another Indus Valley site in Rajasthan with evidence of ploughed fields but from a later period (Harappan phase).
Takeaway: Mehrgarh shows a continuous development from early farming communities to the Indus Valley Civilization, with evidence of mud-brick houses, granaries, and burial practices with grave goods.