How many persons are designated senior to A?

Study the following information carefully and answer the below questions Seven persons- A, B, C, D, E, F, and G are working in the bank on different designations. The designations are Chief executive officer, General manager, Deputy general manager, Assistant general manager, Chief manager, Manager, and Clerk where Chief executive officer is the seniormost designated person and Clerk is the juniormost designated person. A works junior to Assistant general manager. Only two persons are designated between A and
D. The number of persons working senior to D is same as the number of persons working junior to
B. Only one person is designated between B and F. As many persons designated between B and D is same as between C and G. G is senior to C who does not work as an Assistant general manager.