Bahlul Khan Lodi ascended the chair of the Delhi sultanate on _________ ?

A. 19th April 1451
B. 20th May 1451
C. 21st July 1453
D. 22nd October 1455

After the last Sayyid ruler of Delhi, Ala-ud-Din Alam Shah voluntarily abdicated in favour of him, Bahlul Khan Lodi ascended the throne of the Delhi sultanate on 19 April 1451.