Explanation:

- There are six employees (A, B, C, D, E, and F) seated at a round table with eight chairs.

- Two chairs remain empty, not opposite each other.

- One employee has no one sitting adjacent to them.

- E is sitting third to the right of F.

- B is sitting opposite A.

- D is sitting opposite E.

- C is sitting between A and E.

- The boss is next to one of the empty chairs on each side.

Considering these points:

- E must be three seats from F.

- B opposite A means they are directly across.

- C between A and E establishes further positioning.

- D opposite E fits nicely with the seat allocations.

Putting these details together, D is the boss, as D is the one sitting next to a vacant chair on each side.

Correct Answer: Option 2, D