On the basis of the information provided below, answer these questions :
Six people A, B, C, D, E and F are sitting on the ground in a hexagonal shape. All the sides of the hexagon so formed are of same length. A is not adjacent to B or C; D is not adjacent to C or E; B and C are adjacent; F is in the middle of D and C.
Which of the following is not a correct neighbor pair?
A A and F B D and F C B and E D C and F E None of these
Tow seating arrangements are possible :
D and f, B and E, C and F are all neighbors while A and F are not.