Who was first to introduce Nauroz festival during Delhi Sultanate? A) Balban B) Ibrahim Lodhi C) Feroz Shah Tughlaq D) Khizer Shah Related MCQs: The major source of royal income during Delhi sultanate was? Mongols leader Halaku’s grandson Abdullah invaded Delhi sultanate during the reign of….? Who established the system of auditing the accounts during Delhi Sultanate? Rukn-ud-din Firuz ruled the Delhi sultanate about ….. ?