Explanation:

- Rajkumar Singhajit Singh was awarded the Padma Shri in 1986 for his contributions to the traditional dance form of Manipuri.

- Kathakali (Option 1) is a classical dance form from Kerala, characterized by its elaborate costumes and detailed gestures.

- Kathak (Option 2) is a classical dance from northern India known for its storytelling through dance and complex footwork.

- Mohiniyattam (Option 3) is another classical dance form from Kerala, noted for its graceful and flowing movements.

- Manipuri (Option 4) is the correct answer as Rajkumar Singhajit Singh made significant contributions to this elegant and lyrical dance form from Manipur.

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