The correct answer is: B. Qutb-ud-din Aibak
Qutb-ud-din Aibak was a slave of Turk origin who founded the Slave dynasty in Delhi in 1206 AD. He was a general in the army of Muhammad Ghori, the ruler of Ghor in Afghanistan. After Ghori’s death in 1206, Aibak became the ruler of Delhi and founded the Slave dynasty. He was a powerful and successful ruler who expanded the territory of his kingdom. He also built many important buildings, including the Qutb Minar in Delhi.
A. Iltutmish was the second ruler of the Slave dynasty. He was a son of Qutb-ud-din Aibak. Iltutmish was a strong and capable ruler who expanded the territory of his kingdom. He also built many important buildings, including the Alai Darwaza in Delhi.
C. Ruknuddin Firuz was the third ruler of the Slave dynasty. He was a son of Iltutmish. Ruknuddin was a weak and unpopular ruler. He was overthrown and killed in 1236.
D. Razia Sultan was the only female ruler of the Slave dynasty. She was the daughter of Iltutmish. Razia was a capable and intelligent ruler. She was, however, opposed by the conservative Muslim clergy. She was overthrown and killed in 1240.