Who was the first ruler of Ilbari dynasty (Delhi Sultanate)?

The correct answer is Option 1- Qutubuddin Aibak

The first ruler of the Ilbari dynasty (Slave Dynsaty, Delhi Sultanate) was Qutubuddin Aibak.

Qutubuddin Aibak was a slave general of the Ghurid ruler Muhammad Ghori. After Ghori's death in 1206, Qutubuddin Aibak declared himself Sultan of Delhi and founded the Ilbari dynasty.

Qutubuddin Aibak was a skilled military leader and a wise administrator. He expanded the territory of the Delhi Sultanate and laid the foundation for a strong and stable government. He also built many important monuments, including the Qutub Minar in Delhi.

Qutubuddin Aibak died in 1210, after a short reign of four years. He was succeeded by his son-in-law, Iltutmish.