Which Delhi Sultan is known for adopting the 'blood and iron' policy?

Which one of the following Sultans is known for having abolished the tax on grains?

Which ruler of Delhi Sultanate is known as “Lakh Baksh”?

Which dynasty of Delhi Sultanate ruled for the shortest period?

Which period is called the era of “the rule of the Forty” in the history of Delhi Sultanate age?

Which Sultan of Delhi assumed the title of Alexander the Great –