Who was the leader of the Muslim forces during the Battle of Yarmouk?

A. Ali ibn Abi Talib
B. Umar ibn al-Khattab
C. Khalid ibn al-Walid
D. Amr ibn al-As

Answer: Khalid ibn al-Walid


Additional Information: Khalid ibn al-Walid led the Muslim forces to a decisive victory in the Battle of Yarmouk against the Byzantine Empire.