Question

who had imprisoned Rajyashree​

Answer 1

Kanauj and Magadha were strong centres of Buddhism, and here Rajyashri was exposed to Buddhist teachings and became a Mahayana Buddhist. Some months after Rajya Vardhan's succession, Grahavarman was defeated in battle and killed by Deva Gupta of Malwa and Rajyasri was thrown into prison.

Answer 2

Kanauj and Magadha were strong centres of Buddhism, and here Rajyashri was exposed to Buddhist teachings and became a Mahayana Buddhist. Some months after Rajya Vardhan's succession, Grahavarman was defeated in battle and killed by Deva Gupta of Malwa and Rajyasri was thrown into prison.