(i) A, B, C, D, E, F and G are sitting on wall and facing east..
(ii) C is on the immediate right to D.
(iii) B is at an extreme end and has E as his neighbour.
(iv) G is between E and F.
(v) D is sitting third from the south end.
Name the person who should change the place with C such that C gets the third place from north end