The Ilbari dynasty is famously known as

The correct answer is Option (1) → The Slave Dynasty

The first dynasty of the Delhi Sultanate (1206-1290), founded by Qutbuddin Aibak, is called the Slave dynasty or the Mamluk dynasty, because Aibak, Iltutmish and Balban had all begun life as slaves. It is also called the Ilbari dynasty, after the Ilbari tribe of Turks to which Iltutmish and Balban belonged.