Who is /are the neighbour(s) of D?

As per Question,
A, B, C, D, E, F, G and H are setting in a row facing North.
A is fourth to the right of E.
E -- 1 -- 2 -- 3 -- A
H is fourth to the left of D.
H -- 1 -- 2 -- 3 -- D
C and F, which are not at the ends, are neighbors of B and E, respectively.
-- --C -- B -- -- -- F -- E-- --
H is next to the left of A and A is the neighbor of B.
-- -- --H--A --B -- --
The order of sittings of eight persons which satisfies all the above condition will be as in below figure.
E--F--G--H--A--B--C--D
Because D is to the extreme right hence, has only one neighbor C.