Explanation:

Let’s break it down step by step:

- Seven seats, facing north: So let’s sketch 1–7 left to right.

- G4 sits fifth to the right of G1: That means four people between G1 and G4. So, if G1 is at position 1, G4 goes at 6. If G4 isn't at an end, they can’t be at 1 or 7.

- G4 can’t be at the ends. That means G1 can’t be at 3 or higher (because G4 would fall off the row if you tried).

- G6 sits in the middle: Spot 4 is G6.

- G6 is third to the left of G2: Three seats left, so G2 is at position 7.

- Only two girls between G7 and G5: So G5 and G7 have two seats apart.

- G7 not next to G6 (not at 3 or 5).

Putting this all together, the only arrangement that fits is:

1. G1

2. ___

3. ___

4. G6

5. G4

6. ___

7. G2

Back-tracing, G4 is fifth right of G1—so G1 in 1, G4 in 6, but G4 can't be at end. Try G1 in 2, G4 in 7. Then G6 would be in 4, G2 would need to be in 7. Not possible. So only G1 in 1, G4 in 6, G6 in 4, G2 in 7 fits; now fit the rest.

Now, G7 and G5 must be two apart, and G7 not next to G6. Filling possible spots:

- G3 must be only in 2, 3, or 5. Try each—if G7 goes in 2, G5 in 5, G3 in 3.

Final row:

1. G1

2. G7

3. G3

4. G6

5. G5

6. G4

7. G2

So, the immediate neighbours of G3 are G7 and G6, meaning option 3.

Option 3: G6 and G7 is the right answer.