Concept:Kunwar Singh was a prominent zamindar who owned the estate of Jagdishpur in Bihar. He is known for his leadership in the 1857 rebellion.Explanation:Kunwar Singh (1777–1858) was the zamindar of Jagdishpur, a region near Arrah in present-day Bihar. He belonged to the Ujjainiya Rajput clan. At the age of 80, he led a revolt against the British in 1857. He captured Arrah and later fought a decisive battle near Jagdishpur on 23 April 1858, defeating Captain Le Grand’s forces. His historical role confirms that his zamindari was in Jagdishpur, not in Barrackpore, Avadh, or Bithoor. Therefore, the correct option is Jagdishpur.Answer:Option B – Jagdishpur