In Hazrat Abu Bakar (RA) era the siege of Damascus by Muslim army was started on:

A. 21 august 634 ce

B. 20 august 634 ce
C. 20 august 635 ce
D. None of these

Explanation: The siege of Damascus by the Muslim army during the era of Hazrat Abu Bakr (RA) began on August 21, 634 A.D. (20th Jamadi-ul-Akhir, 13th year of Hijra).

Occurrence: Concept Academy Notes