given below: 5 d g e « 7 9 $ f 1 6 r % l i a j 3 b # 4 @ k p 8 u m 2 four of the following five are alike in a certain way on the basis of their positions in the above arrangement and so form a group. which is the one that does not belong to the group?
17. if all the symbols are removed from the above arrangement which element will be third to the left of thirteenth from the left ?
18. what will come in place of the question mark (?) in the following series based on the above arrangement 