Given: A, B, C, D, E and F are sitting in a row. The mouth of 3 is facing the north and the face of 3 is towards the south side.
1) A is sitting in the north from the left side of E to the third position.
2) None of the A and E are sitting on any end of the line.

3) The face of B, A and F is in the same direction.
4) D and C are neighbors whose faces are in the same direction.
5) B is sitting second from the left of C.
As B, A, and F face the same direction and E faces the north direction, therefore according to given condition of an equal number of people faces north and south sides B, A and F will be facing south side.
So, the rest i.e. C, D, and E will be facing the north side.
After positioning D, C, and B only one position is left which will be occupied by the only person left i.e. F.
Thus, according to the final arrangement:
Option 1) C's mouth is in the south → Incorrect as C faces north.

Option 2) E and F are neighbors → Correct
Option 3) Both B and F are sitting on the last ends of the line → Correct
Option 4) A is sitting fourth from the right of F → Correct
Hence, "Option 1" is the correct answer.