The correct option is B Diwan-i-Ariz
Diwan - i - Ariz was in charge of recruitments , organization of army. Headed by Arz - i- Mumalik who was in charge of the administration of military affairs that included maintaining royal contingent recruiting the soldiers , ensuring the discipline and fitness of the army, inspecting the troops maintained by Iqta- holders , examining the horses and branding them with the royal insignia.