The Khalji Revolution:

The Khalji Revolution refers to a series of significant changes that took place during the reign of the Khalji dynasty in medieval India. These changes were diverse and encompassed various aspects of political, social, and administrative structures. The correct answer to the question is option 'D', which states that the Khalji Revolution consisted of all of the above mentioned changes. Let's delve into each of these changes in detail:

Change in the racial composition of the rulers:
During the Khalji period, there was a notable shift in the racial composition of the ruling elite. The Khaljis were of Turkish origin, and their rise to power marked a change from the previous Ilbari dynasty, which was of Central Asian origin. This transition led to a change in the cultural and ethnic background of the rulers, which had an impact on the courtly practices and policies.

Dynastic change from Ilbaris to the Khaljis:
The Khalji Revolution also involved a dynastic change, with the Khaljis replacing the Ilbaris as the ruling dynasty in Delhi. Jalal ud-Din Firuz Khalji, the founder of the Khalji dynasty, overthrew the last ruler of the Ilbari dynasty, Muiz ud-Din Qaiqabad. This shift in power marked a significant turning point in the political history of medieval India.

Creation of a heterogeneous nobility and revolutionary administrative changes:
One of the key aspects of the Khalji Revolution was the creation of a diverse and heterogeneous nobility. The Khalji rulers, recognizing the importance of maintaining a loyal and efficient administrative system, recruited individuals from various backgrounds and regions into their administration. This inclusivity led to the formation of a cosmopolitan and diverse nobility, comprising both Muslims and Hindus.

Alongside the formation of a heterogeneous nobility, the Khaljis also implemented revolutionary administrative changes. They introduced various administrative reforms, such as the appointment of trusted officials in key administrative positions, decentralization of power to provinces, and improvement in revenue administration. These changes aimed to strengthen the central authority and enhance governance across the empire.

Conclusion:
In conclusion, the Khalji Revolution encompassed a range of changes, including a shift in the racial composition of rulers, a dynastic change from Ilbaris to the Khaljis, and the creation of a heterogeneous nobility along with revolutionary administrative reforms. Each of these changes played a significant role in shaping the socio-political landscape of medieval India during the Khalji period.