The correct answer is Alauddin Khilji.

• ​​Alauddin Khilji:
  • ​After murdering his father-in-law Jalaluddin Khalji treacherously Alauddin Khalji seated upon the throne of Delhi.
  • He controlled the nobles, intelligence system, liquor selling effectively in order to make hi reign free from rebellions.
  • He destroyed the dominance of Ulemas in the State.
  • He was a mighty warrior and a successful general.
  • Reforms of Alauddin Khalji includes dagh (branding of hoses) and huliya (detailed list of soldiers), market reforms, paying salary in cash to soldiers
  • Four separate markets in Delhi included each for grain cloth, sugar, dried fruits, butter and oil, horses, slaves and cattle and last for miscellaneous commodities.
  • Each market was under the control of an officer called Shahna-i- Mandi.
  • The supply of food grain was ensured by holding stocks in government store-houses. Fix price system of all commodities were adopted. A separate department called Diwani Riyasat was created under an officer called Naib-i-Riyasat. Every merchant had to register under the Market department.
  • Secret agents called munhiyans were installed to sent reports to the Sultan regarding the functioning of these markets.
  • Measurement of land was done first time during his reign.
  • Military Campaigns includes against Mongols, Rajput kings of Ranthambore and Chittor, even he extended his reign up to far south in Deccan.
  • He patronized poets like Amir Khusrau and Amir Hasan.
  • He also built a famous gateway known as Alai Darwaza and constructed a new capital at Siri. 

• Muhamad Tughlaq:
  • An attractive character in the history of medieval India due to his ambitious schemes and novel experiments.
  • Tughlaq introduced the token currency system.
  • Takkavi loans were given to farmers to extend agriculture.
  • A department for agriculture, Diwan- i- Kohi was established.
• Qutubuddin Aibak:
  • He was the slave of Muhammad Ghori, who made him the Governor of his Indian possessions.
  • After the death of Ghori, he formed slave dynasty by declaring himself independent from Ghori dynasty and made Lahore his capital.
  • Great scholar Hasan Nizami was patronised by him.
• Altamash (Iltutmish):
  • The most magnificent building of the 13th century, the Qutub Minar was founded by Aibek and completed by Iltutmish.
  • Iltutmish came from the Ilbari tribe and hence his dynasty was named as Ilbari dynasty.