The administrative department responsible for the royal correspondence and secretarial work under the Delhi Sultanate was known as:

💡 Solution & Explanation

Diwan-i-Insha functioned as the royal secretariat under the Delhi Sultanate, managing state correspondence and imperial proclamations. Diwan-i-Arz handled military administration while Diwan-i-Wizarat managed financial matters and revenue collection. Administrative terminology from medieval Indian history is regularly tested in public service examinations.