Which of the following Harappan town was located on Khadir Beyt in the Runn of Kutch and was divided into three parts?

Dholavira

The correct answer is Option 4- Dholavira

The Harappan town located on Khadir Beyt in the Rann of Kutch and divided into three parts is Dholavira. Dholavira, the ancient Harappan site, was divided into three parts. These are: The Citadel, the Middle Town and the Lower Town.

Remaining options:
Sotka-koh: This was a Harappan site located in Balochistan, Pakistan.
Chanhudaro: This was another Harappan site located in Sindh, Pakistan.
Surkotada: This was a Harappan site located in Gujarat, India, but not on Khadir Beyt and not divided into three parts.