The correct answer is: d) Chandel.
Megalithic sites are archaeological sites that contain megaliths, which are large stones that have been erected by humans. Megalithic sites are found all over the world, and they date back to prehistoric times. The purpose of megalithic sites is not always clear, but they may have been used for religious or ceremonial purposes.
In Manipur, megalithic sites have been discovered in the Chandel district. These sites date back to the Iron Age, and they contain a variety of megalithic structures, including menhirs (standing stones), dolmens (stone tables), and cromlechs (stone circles). The megalithic sites in Chandel are important because they provide evidence of the early history of Manipur.
The other options are incorrect because:
- Willong Khullen is a village in the Chandel district of Manipur. There are no megalithic sites in Willong Khullen.
- Thoubal is a district in Manipur. There are no megalithic sites in Thoubal.
- Imphal East is a district in Manipur. There are no megalithic sites in Imphal East.