D is on the left of C i.e. C, D.
B is on the right of E i.e. B, E.
A is on the right of C i.e. A, C.
B is on the right of D i.e. D, B.
From the above statements, the correct order is : A, C, D, B, E.
Clearly, D is sitting in the centre.
Note : It is given that A, B, C, D, E are sitting facing you. So, your right and left will be considered as left and right respectively.