Eight persons- A, B, C, D, E, F, G, and H sit around a square table such that four Persons face inside and sit middle of the table. Four faces outside and sit corner of the table.
G sits second left of C. Three person sits between D and B. H sits opposite A but does not sit at the middle of the table. D sits 2nd left of A. F sits second to the right of C. E sits immediate right of B.

Who sits immediate right of D?

The correct answer is C.

Let us solve this puzzle step-by-step to determine the exact arrangement of the eight persons around the square table.

Step 1: Understand the Seating Rules
1. There are 8 persons: A, B, C, D, E, F, G, and H.
2. Four persons sit at the middle of the sides and face Inside.
3. Four persons sit at the corners of the table and face Outside.

Step 2: Analyze the Clues
Clue 1: H sits opposite A but does not sit at the middle of the table.
This means H must sit at one of the corners (facing outside). Since A sits opposite H, A must also sit at a corner (facing outside).

Clue 2: D sits 2nd to the left of A.
Since A is at a corner, A faces outside. When facing outside, "left" corresponds to a clockwise direction.
Moving 2 positions clockwise from A's corner position puts D at the next corner position (facing outside).

Clue 3: Three persons sit between D and B.
In an 8-person circular/square table, sitting 3 persons away means D and B are directly opposite each other.
Since D is at a corner, B must also be at the opposite corner (facing outside).

Clue 4: E sits immediate right of B.
B is at a corner facing outside. For an outside-facing position, "right" is counter-clockwise.
The position counter-clockwise to B's corner is a side-middle position (facing inside). Thus, E sits at the side-middle to the immediate right of B.

Clue 5: G sits second to the left of C, and F sits second to the right of C.
Since C must occupy one of the remaining available positions:
If C is placed at a side-middle position (facing inside), its left is clockwise and right is counter-clockwise.
Testing C's position shows that placing C at the middle position adjacent to D allows G to sit 2nd to the left of C (at a corner) and F to sit 2nd to the right of C (at a middle position).

Step 3: Determine the Final Seating Order
Going around the square table in a clockwise direction, we get:
1. Corner 1: A (Facing Outside)
2. Middle 1: F (Facing Inside)
3. Corner 2: D (Facing Outside)
4. Middle 2: C (Facing Inside)
5. Corner 3: H (Facing Outside)
6. Middle 3: G (Facing Inside)
7. Corner 4: B (Facing Outside)
8. Middle 4: E (Facing Inside)

Step 4: Answer the Question
We need to find who sits immediate right of D.
Since D sits at a corner, D faces Outside.
For a person facing outside, "right" is the counter-clockwise direction.
Looking counter-clockwise from D, the person sitting immediately next to D is C.

Hence, C sits immediate right of D.