Nine individuals A, B, C, D, E, F, G, H, and I hold different posts in a company. The posts, in descending order of seniority, are CEO, CFO, CTO, CMO,...

Nine individuals A, B, C, D, E, F, G, H, and I hold different posts in a company. The posts, in descending order of seniority, are CEO, CFO, CTO, CMO, VP, GM, AGM, DGM, and Manager. The following conditions apply:

• An odd number of persons are senior to B.
• There are four persons between B and H.
• C is two designations senior to H.
• The number of persons between B and C is two less than the number of persons senior to E.
• A is four designations junior to G.
• The number of persons junior to G is four more than the number of persons senior to F.
• D is not the Assistant General Manager.

Question: Among which pair of persons is the first person exactly three designations senior to the second person?