The correct option is A
Administrative rights
Explanation:
The East India Company became the real master of Bengal at least from 1765. Its army was in sole control of its defence and the supreme political power was in its hands. The Nawab depended for his internal and external security on the British. Under Diwani rights, the Company directly collected its revenues, while through the right to nominate the Deputy Subahdar, it controlled the Nizamat or the police and judicial powers. The virtual unity of the two branches of Government under British control was signified by the fact that the same person acted in Bengal as the Deputy Diwan on behalf of the Company and as Deputy Subahdar on behalf of the Nawab. This arrangement is known in history as the Dual or Double Government.