Study the following information carefully and answer the questions given…

Study the following information carefully and answer the questions given below:
Eight persons – A, B, C, D, E, F, G and H are designated at the eight different designations – Chairman, Managing Director (MD), General Manager (GM), Deputy General Manager (DGM),Senior Manager (SM), Manager, Assistant Manager (AM) and Clerk, but not necessarily in the same order. The order of the designations is in decreasing order of seniority such that Chairman is the seniormost designation and Clerk is the junior-most. G is designated three designations senior to D. The number of persons designated junior to D is two more than the number of person designated senior to E. Three persons are designated between E and H. C is designated junior to H. A is designated senior to Manager. F is designated four persons junior to A. B is designated senior to DGM.

Which of the following is the designation of D?