Explanation:

- Nongkrem Dance Festival: This is a significant cultural and religious festival celebrated by the Khasi tribe in Meghalaya. It is held to honor the deity Ka Blei Synshar for a bountiful harvest and the well-being of the people.

- Option 1: Mizoram: Known for its own unique festivals, such as Chapchar Kut, but Nongkrem is not celebrated here.

- Option 2: Tripura: While Tripura has festivals like Kharchi Puja, it does not celebrate the Nongkrem Dance Festival.

- Option 3: Meghalaya: Correct Answer. This Indian state is home to the Khasi tribe, who celebrate the Nongkrem Dance Festival annually.

- Option 4: Arunachal Pradesh: Famous for festivals like Losar and Solung, but Nongkrem is not part of its cultural celebrations.

Correct Answer: Option 3: Meghalaya