The term Delhi Sultanate used to cover? A) Four dynasties B) Five dynasties C) Six dynasties D) Seven dynasties Related MCQs: Which sultan of Delhi sultanate defeated the ruler of Gwalior Man Sing Tomar ? The cause for decline of Delhi Sultanate was/were? Rukn-ud-din Firuz ruled the Delhi sultanate about ….. ? The major source of royal income during Delhi sultanate was?