After the death of Muhammad, his successors came to be known as ________.
The contagious nature of tuberculosis was discovered by _________.
The principal city of Omayyad dynasty was ________.
Sufis began to write Hindi poetry for their Sama(musical) parties form the beginning of the _______ century.
The capital city of Abbasid dynasty was _________.
The Khalifas shifted their capital form Medina to ________.
