People :A, B, C, D, E and F.
1) All are facing south.
2) E is sitting third to the right of F.
3) Neither E nor F is sitting at any of the extreme ends.
4) D is sitting immediate left of A.
5) B is not an immediate neighbour of F.
1) C is sitting fifth to the left of B → true.
2) C is sitting fifth to the right of B → false.
3) C is sitting third to the right of A → false.
4) C is sitting fourth to the left of D → false.
Hence, C is sitting fifth to the left of B.