A unique ‘signboard’ inscription was found at which Harappan site?

The correct answer is Dholavira.

Dholavira is an archaeological site of the Indus Valley Civilization located in the Kutch district of Gujarat, India. It is one of the largest Harappan sites in India, and is known for its well-preserved fortifications, water management system, and urban planning.

The ‘signboard’ inscription was found on a stone slab at the site. It is a unique piece of evidence of the Harappan writing system, and is thought to be a signboard for a public building.

The other options are incorrect because:

• Lothal is another large Harappan site located in Gujarat. It is known for its dockyard, which is one of the earliest known examples of a man-made harbor.
• Surkotada is a Harappan site located in Kutch district of Gujarat. It is known for its well-preserved fortifications and water management system.
• Rangpur is a Harappan site located in the Barmer district of Rajasthan. It is known for its large size and well-preserved remains.