Directions: Read the given information carefully and answer the questions that follow.
Six students A, B, C, D, E and F sit in a row facing North(not necessarily in the same order).
i) C sits fourth to the right of the one who sits second to the left of D.
ii) There are three persons between F and C and exactly one person between E and A who sits at an extreme end of the line.
iii) B and C are not neighbours.

If B interchanges his position with E, C interchanges his position with A and D interchanges his position with F, who sits third to the right of D?

Correct option is C

Six persons: A, B, C, D, E, F (facing North)

Condition i:
C is fourth to the right of the one who is second to the left of D

Condition ii:
3 persons between F and C
1 person between E and A
A is at extreme end

Condition iii:
B and C are not neighbours

Final arrangement (Left → Right):
F B D E C A

After swapping:

B ↔ E
C ↔ A
D ↔ F

New arrangement:

D E F B A C
D is at position 1
3rd to the right of D → position 4 → B