Who among the following is famous for his market policy and fixation of prices?

Correct answer is (2). 

Ala-ud-din Khilji's military ambitions required a standing and strong army, especially after the Mongol siege of Delhi. Maintaining a large army at regular salaries, however, would be severe drain on the treasury. A system of price controls reduced the salary amount that needed to be paid. Three separate markets were set up in Delhi. The first one for food grains, the second for cloth and items such as ghee, oil and sugar and the third market was for horses, cattle and slaves. Regulations were laid out for the operations of these markets. He took various steps to control the prices. He exercised supervision over the markets. He fixed the prices of all the commodities from top to bottom. Market officers, called Shahna, were appointed to keep a check on the prices.