Correct Answer: (e) Muhammad-bin-Tughluq & Alauddin Khilji
Solution:Alauddin Khalji fixed the land revenue (Kharaj) to one- half of the produce. He was the first Indian Muslim king to impose a tax on the actual income of the land. He was the first ruler who started charging taxes by measuring the land. He fixed the revenue by measuring the land. Alauddin also levied the house and grazing taxes. It is also described that Muhammad-Bin-Tughluq had also charged the 50% land revenue. In Doab, area Muhammad-Bin-Tughluq's revenue demand was based upon estimate, but Alauddin Khalji's demand was upon the measurement of land.