After the Battle of Yermuk, which was won by the Muslims Khalid bin Waleed was removed by the Caliph Umar (RA) from his supreme command. The new Supereme Commander was:
A. Amr bin Al Aas (RA)
B. Abu Ubaydah (RA)
C. Saad bin Abi Waqas (RA)
D. Hazrat Bilal (RA)