Explanation:

- Sangrai is a folk dance of the state of Tripura in India.

- Option: 2, Tripura: It's a northeastern state known for its rich cultural heritage, including various folk dances. Sangrai is among these traditional dances, often performed during festivals like the Sangrai festival celebrated by the Mog community.

- Option: 1, Bihar: Known for dances like Jat-Jatin and Bidesia, but Sangrai is not one of them.

- Option: 3, Karnataka: Famous for Yakshagana and Dollu Kunitha, not Sangrai.

- Option: 4, Goa: Known for traditional dances like Dekhni and Fugdi, not Sangrai.