A question is followed by two statements numbered (I) and (II). You have to decide whether the data provided in the statement/s is/are sufficient/necessary to answer the question. Read both the statements and decide the appropriate answer.

Question: Six students A, B, C, D, E, F, are sitting in a straight line facing north direction. D is sitting third to the right of B. E is sitting third to the left of C. Who is sitting to the immediate left of B?

I.  D and E are sitting at the extreme ends.

II. A is sitting third to the left of F.​

Question: Six students A, B, C, D, E, F, are sitting in a straight line facing north direction. D is sitting third to the right of B. E is sitting third to the left of C. Who is sitting to the immediate left of B?

From I. D and E are sitting at the extreme ends.

From Statement I alone, we can't get- Who is sitting to the immediate left of B.

From II. A is sitting third to the left of F.

From Statement II alone, we can't get definite position of - Who is sitting to the immediate left of B.

Thus, correct option is (b).