Four of the following five are alike in a certain way and hence form a group. Who among the following person does not belong to that group?

Study the following information carefully and answer the below questions   Eight persons – A, B, C, D, E, F, G and H are sitting in the square table such that all of them are facing towards the center. Four persons are sitting in the middle of the sides of the table and four persons are sitting at the corner of the table. All the information is not necessarily in the same order.   A sits second to the left of G, who sits at one of the corner of the table. H sits either to the immediate right or to the immediate left of
A. D sits opposite to the one who sits second to the left of
C. C sits in the middle of the sides of table. D is neither the immediate neighbor of G nor
A. E is the immediate neighbor of either of A or F, but not the both. B  sits second to the left of F.