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

The Sultan who is said to have raised the land revenue to one-half of the produce was

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

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

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

The full name of Sultan of Delhi, Balban was?