Correct Option
Lothal (Gujarat) is notable for the discovery of a dockyard, indicating its significance as a port city and its role in maritime trade during the Harappan period.
Kalibangan (Rajasthan) provides evidence of a ploughed field, which is considered one of the earliest examples of agricultural activity in the Harappan civilization.
Dholavira (Gujarat) is known for an inscription comprising ten large-sized signs of the Harappan script, often referred to as the 'Dholavira Signboard'.
Banawali (Haryana) yielded a terracotta replica of a plough, suggesting the use of advanced agricultural implements.
Incorrect Options
Options A, C, and D present incorrect pairings of ancient sites with their archaeological findings. Each Harappan site possesses distinct archaeological discoveries that are crucial for understanding the diverse aspects of the civilization, including its urban planning, agricultural practices, trade networks, and cultural expressions. Misattributing findings to different sites leads to an inaccurate representation of the specific characteristics and contributions of each location within the broader Harappan context.