Explanation:

- There are 8 chairs (number them 1 to 8).

- G and F are opposite each other (fixed positions e.g. 1 & 5).

- C and D are at equal distances from both A and B (so, C and D are symmetrically opposite with respect to A and B).

- E sits between A and C.

- Place A anywhere, say position 2. Put B somewhere; to keep C and D equidistant from A and B, place B at position 6.

- Then, C and D must be at positions 4 and 8 (they are 2 seats away from both A and B).

- E sits between A and C, so E must be at position 3.

- Now, G and F sit opposite each other: choose available spots like 1 and 5.

- The remaining position, 7, goes to H.

- H is next to D (at position 8).

Option 1: Adjacent to D (Correct)

Option 2: Adjacent to A - No.

Option 3: Adjacent to F - No.

Option 4: Adjacent to G - No.