Explanation:

- Start by placing C on the circle, as D sits third to the right of C. This makes D's position determinate once C is placed.

- E sits to the immediate right of D. Thus, E is fixed in its position as soon as D is.

- With E identified, A sits second to the left of E, and B sits fourth to the right of A.

- F and G have two people between them. There are limited places left at this stage to place them, ensuring they fit the sequence.

- G does not sit second to the left of D, which helps fine-tune G’s position.

- Rearrange and validate all sitting positions to ensure all conditions fit.

?? F sits third to the left of E, hence the correct answer is Option 4: F.