Who was the first Sultan of Delhi to participate in the public celebration of Holi?

Which Sultan of Delhi was the first to charge ‘Ghari’ or House-tax?

Who created the department of Diwan-i-Arz in Delhi Sultanate?

The Delhi Sultan who wrote his memoirs, was :

Who was the first Sultan of Delhi who introduced regular coins and declared Delhi the capital of his empire?

The Sultan of Delhi who is reputed to have built the biggest network of canals in India was :