A, B, C , D , E , F and G are seated in a straight line facing North but not necessarily in the same order . Only three people sit between F and A. Neither F nor A sits at an extreme end of the line. Only two peoples it between A and G. E is not an immediate neighbour of either A or F. E sits third Due to left of B . B is not an immediate neighbour of A. E is not an immediate neighbour of C.

Q.  How many persons are seated between B and A?