Correct option is C
Diwan-i-Arz: This was the Military Department responsible for organizing the military affairs of the empire.
Diwan-i-Barid: This was the department of intelligence, which handled the collection of information about internal and external affairs.
Diwan-i-Insha: This department dealt with royal correspondence and state communication, not charity. It was in charge of drafting royal decrees, letters, and communications for the administration.
Diwan-i-Riyasat: This was responsible for the Market Control Department. It was introduced during the reign of Alauddin Khilji to regulate prices and control markets.
Therefore, the incorrectly matched pair is (c) Diwan-i-Insha — Charity Department. The Diwan-i-Insha was related to royal correspondence, not charity.
