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We have, A works junior to Assistant general manager. Only two persons are designated between A and D. From the above condition, there are three possibilities. Again we have, The number of persons working senior to D is same as the number of persons working junior to B. From the above condition, case3 gets eliminated.
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. From the above condition, case2 gets eliminated.
Case1 shows the final arrangement.
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