The correct option is (a).
Explanation
Dholavira is one of the five largest metropolises of the Indus Valley Civilization (IVC). It is distinguished by its unique geometric layout and advanced water management systems.Statement 1 is Correct: The city is located on Khadir Beyt (an island) in the Great Rann of Kutch, Gujarat. This location was strategic for trade and resource management.
Statement 2 is Correct: While most Harappan cities were divided into two parts (the Citadel and the Lower Town), Dholavira presents a unique tripartite division. It consisted of three distinct sections: the Citadel, the Middle Town, and the Lower Town.
Statement 3 is Incorrect: The sections of the city were enclosed by massive stone walls, not wooden fences. The extensive use of cut stone for construction and fortification is a specific characteristic of Dholavira, contrasting with the mud-brick architecture common in other IVC sites.
Statement 4 is Incorrect: Evidence of writing was definitely found at the site. One of the most significant discoveries at Dholavira is a large "Signboard" containing ten large-sized inscriptions of the Harappan script, which was likely mounted above a gateway.
Key Takeaway: Dholavira is unique among IVC sites for its three-part city layout, the use of stone instead of mud bricks for walls, and the discovery of the large-script signboard.