Which of the following statements is not true?

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.

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

Statement (d) is wrong because C is next to the right of B.

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

It is clear from the above order that F is next to the right of E.

According to question,
We can draw a figure , in which C is to the left of D, F is between A and E, and E is between F and D.
From it is clear that , E is to the left of F.
Sitting sequence :-

According to question,
We can draw a figure , in which E and F are in the centre and A and B are at the ends. C is sitting on the-left of A.
From given figure it is clear that , D is sitting on the right of B.
Sitting arrangement :-

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
E and D are sitting at the extreme ends.

On the basis of given information in the above question, the arrangement of standing will be like below.
--E--K--A--J--B--I--G--C--H--D--F
It is clear from the figure drawn on the basis of the information that student I is sitting in the middle of the row.

On the basis of given information in the above question, the arrangement of standing will be like below.
--E--K--A--J--B--I--G--C--H--D--F
CHDF are sitting to the right of G.

On the basis of given information in the above question, the arrangement of standing will be like below.
--E--K--A--J--B--I--G--C--H--D--F
All the information is required to know the position of all students in the row.

According to question,
Draw a figure as per the details the six members of a panel sitting in a row ,
From figure ,it is clear that the members P and R are at the extreme .
Sitting arrangement :-