The correct option is A Kalinjar
Kalinjar fort was the last expedition of Shershah. Sher Shah Suri marched against the kalinjar fort and captured it. soon after the capture , Sher Shah Suri died on 22nd May 1545. The fort of Kalinjar is in the Buldelkhand region of Uttar Pradesh.Immediatley after the conclusion of the successful campaign in Rajasthan, Sher Shah marched on Kalinjar.