The correct answer is Alauddin Khalji.
Alauddin Khalji was the second ruler of the Khalji dynasty of the Delhi Sultanate. He was a powerful and ruthless ruler who expanded the Delhi Sultanate to its greatest extent. He was also a great patron of the arts and sciences.
In 1299, Alauddin Khalji invaded Gujarat. The invasion was successful and Gujarat was annexed to the Delhi Sultanate. The invasion was a major turning point in the history of Gujarat. It led to the decline of the Gujarati Hindu kingdoms and the rise of Muslim power in the region.
Qutbuddin Aibak was the first ruler of the Mamluk dynasty of the Delhi Sultanate. He was a slave of Muhammad Ghori, the founder of the Ghurid dynasty. Qutbuddin Aibak was a capable and successful ruler who expanded the Delhi Sultanate to include much of northern India.
Iltutmish was the second ruler of the Mamluk dynasty of the Delhi Sultanate. He was a son of Qutbuddin Aibak. Iltutmish was a powerful and successful ruler who expanded the Delhi Sultanate to include much of central India.
Muhammad bin Tughlaq was the third ruler of the Tughlaq dynasty of the Delhi Sultanate. He was a son of Ghiyasuddin Tughlaq, the founder of the Tughlaq dynasty. Muhammad bin Tughlaq was a powerful and ambitious ruler who attempted to expand the Delhi Sultanate to include much of southern India. However, his reign was marked by instability and rebellion.
In conclusion, the first major invasion of Gujarat by the Delhi Sultanate was led by Alauddin Khalji.