Explanation

• After the decline of the Slave dynasty, the Sultanate became more fragile and unstable due to the numerous revolts and aggression.
• The slave Dynasty was replaced by the Khilji Dynasty as the ruling dynasty of India.
• The founder of the Khilji Dynasty was Jalal ud din Firuz Khilji.
•  He killed the last descendent of the Slave Dynasty and then he declared himself the sultan of Delhi sultanate at the age of 70 years.
• Jalaluddin Khilji was killed by his nephew and son-in-law Alauddin Khilji who succeeded him and became the new King.
• The real name of Alauddin Khilji was Ali Gurshap.