Four of the following five are alike in a certain way and thus form a group. Find the one which doesn’t belong to the group? Study the following information carefully and answer the questions given below:

Eight persons- A, B, C, D, E, F, G and H sit around a rectangular table in such a way that four of them are sitting at the corners and facing the centre while four of them are sitting in the middle of the sides and facing away from the centre but not necessarily in the same order.

F sits at one of the corners of the table and sits second to the left of H. E sits to the immediate right of H. Only two persons sit between E and D. C sits third to the right of D. Only three persons sit between C and G. G sits adjacent to B. A doesn’t sit at the shorter side of the table.

The correct answer is A.

To find the odd one out, let us first determine the seating arrangement of the eight persons (A, B, C, D, E, F, G, and H) around the rectangular table based on the given clues:

1. F sits at one of the corners of the table and sits second to the left of H:
Since F sits at a corner, it faces the centre. H must also sit at a corner because a person sitting at a middle side (facing away) cannot have a corner seat as their second to the left.
Let us place H at the top-left corner (facing centre).
For those facing the centre, left is clockwise. Thus, second to the left of H (clockwise) is the bottom-left corner. So, F sits at the bottom-left corner.

2. E sits to the immediate right of H:
For H (facing centre), right is counter-clockwise. Therefore, E sits at the middle of the top side. E sits at the top middle (facing away).

3. Only two persons sit between E and D:
Moving counter-clockwise from E (top middle): top-right corner, right middle, bottom-right corner. Thus, D sits at the bottom-right corner (facing centre).

4. C sits third to the right of D:
D is at a corner (facing centre), so right is counter-clockwise.
1st to the right of D is bottom middle.
2nd to the right of D is bottom-left corner (F).
3rd to the right of D is left middle.
Thus, C sits at the left middle (facing away).

5. Only three persons sit between C and G:
In an 8-person arrangement, having three persons between C and G means they sit opposite to each other.
Since C is at the left middle, G must sit at the opposite side. Thus, G sits at the right middle (facing away).

6. G sits adjacent to B:
G is at the right middle. The adjacent seats are the top-right corner and the bottom-right corner (which is occupied by D). Thus, B sits at the top-right corner (facing centre).

7. Remaining Person:
The only remaining seat is the bottom middle (facing away), and the only remaining person is A. Thus, A sits at the bottom middle (facing away).

Let us analyze the positions of the options given:
• B sits at a corner (facing the centre).
• H sits at a corner (facing the centre).
• D sits at a corner (facing the centre).
• A sits in the middle of a side (facing away from the centre).

Therefore, A does not belong to the group because A sits in the middle of a side, while the others sit at the corners.