30.
Eight girls A, B, C, D, E, F, G and H are sitting around a circular table facing opposite to the centre (not necessarily in the same order). B is second to the left of D. F is third to the left of B. A is second to the left of F. C is second to the left of A. G is third to the left of E.
Three out of the following four options are similar by a certain logic and form a group. Which of the following does NOT belong to that group?