Seven persons A, B, C, D, E, F and G are sitting in a row facing north but not necessarily in the same order. Which of the following persons sit fourth to the left of C?
I. C sits second to the right of
A. Two persons sit between A and F. E sits second to the left of F. Only one person sits between G and
B. D sits third left of E.
II. Three persons sit between G and E. Either G or E sits at one of the extreme end. A sits left of F. B and A are immediate neighbours. C sits right of E.

From I. There will be two cases: G/B        D             G/B        A             E              C             F                                 Case 1. D sits fourth to the left of M. E              _____   F              _____   _____   A             _____                   C                                             Case 2. Case 2 will get discarded as there are only seven person. Hence data in the statement I alone is sufficient to answer the question. From II. G             ____     _____   _____   E   ____                  C Case 1. E       ____            _____   _____   G Case 2. Hence data in the statement II alone is not sufficient to answer the question.