খলিফা আবু বকর কোন সাম্রাজ্যের সম্রাট ছিলেন ?
Abu Bakr () was a sahabi, one of the companions of Muhammad and the first Caliph of Sunni Islam. He was also Muhammad's father-in-law through Aisha. His real name was Abdullah or Abul-Kaaba and Abu Bakr was his kunya.
Sunni Islam