How many persons sit between the one who sits to the immediate right of F and the one who sits to the immediate right of C?

G sits at one of the extreme ends of the line. Only three persons sit between F and G. E sits to the immediate right of G. F sits to the immediate left of D. D faces north. Case-1 Only three persons sit between D and H. H is not facing the same direction as G. C sits third to the right of B. Both C and B are facing the same direction. A sits second to the right of F. Both the immediate neighbors of D face opposite directions. Both F and E face the same direction as A. Hence, case 1 gets eliminated.