Five boys A, B, C, D, and E are standing row, D is on the right of E. B is on the left of E, but on the right of A, B is on the left of C, who is standing on the extreme right . Who is standing in the middle?

According to the question,
arranging the seven members in row,
H E F D C B A
Hence, D is sitting in the middle.

Draw a figure on the basis of above given question ,
C is sitting immediately to the left of E. A is sitting between D and E.
As shown in figure , D is sitting between B and A.
Sitting sequence :-

Draw a figure on the basis of above given question ,
C is sitting immediately to the left of E. A is sitting between D and E.
As shown in figure , B is to the immediate left hand side of C.
Sitting sequence :-

According to question,
We can draw a figure , in which C is standing between A and G. B is standing to the left of E. G is standing between C and E. D and F are to the right of C.
As shown in figure , B is standing at the extreme left.
Sitting arrangement :-

Draw a figure on the basis of above given question ,
C is standing between A and G. B is standing to the left of E. G is standing between C and E. D and F are to the right of C.
As shown in figure , C is standing in the middle.
Sitting arrangement :-

According to the question, arrangement of A, B, C, D, E, and F is as follows
F D A C E B
Thus, F is sitting to the left of D.

It is clear from the figure that A is to the left of D.

E is sitting to the left of C.

E is sitting opposite to A.

D is sitting opposite to C.