Kunwar Singh was a prominent leader of the Revolt of 1857 who belonged to Bihar. He was born in Jagdishpur, which is now a part of Bhojpur district in Bihar. He was a member of the Ujjainiya Rajput clan and was the taluqdar of Jagdishpur.

Kunwar Singh was a skilled military leader and was known for his bravery and charisma. He played a key role in the Revolt of 1857, leading a guerrilla campaign against the British in Bihar. He was eventually killed in battle in 1858, but his legacy continues to inspire Indians today.

The other options are incorrect. Madhya Pradesh, Rajasthan, and Uttar Pradesh are all large states with a long history, but none of them were the birthplace of Kunwar Singh.