Seven girls G1, G2, G3, G4, G5, G6 and G7 sit in a row facing towards the north (not necessarily in the same order). G4 sits fifth to the right of G1. G4 does not sit at any of the extreme ends. G6 sits exactly in the middle of the row. G6 sits third to the left of G2. Only two girls sit between G7 and G5. G7 is not an immediate neighbour of G6. Who are the immediate neighbours of G3?

G6 sits exactly in the middle of the row.

_ _ _ G6 _ _ _

G6 sits third to the left of G2.

_ _ _ G6 _ _ G2

G4 sits fifth to the right of G1. G4 does not sit at any of the extreme ends.

G1 _ _ G6 _ G4 G2
Only two girls sit between G7 and G5. G7 is not an immediate neighbour of G6.

G1 G7 _ G6 G5 G4 G2

Now only G3 is remaining which can be placed in the blank space.

G1 G7 G3 G6 G5 G4 G2

According to the above arrangement, G7 and G6 are the immediate neighbours of G3.