Starting from A's position, if all the eight were arranged in alphabetical order in clockwise direction the seating position of how many members (excluding A) not change ?

A sits third to the left of B and second to the right of F. 

D does not sit next to A or B, => D sits to the immediate left of F. 

C and G always sit next to each other  and C does not sit next to B, => C sits to the immediate right of A and G to the immediate left of B. 

H never sits next to D, => H sits to the immediate left of A and the vacant position, i.e. to the immediate left of D is filled by E.

Starting from A's position, if all the eight were arranged in alphabetical order in clockwise direction the seating position of D, E and G will not change.

=> Ans - (D)