Seven person A, B, C, D, E, F and G are standing in a straight line. D is in the immediate right  of G. C is in between A and B. E is between F and D. F is second to right of D. There are five person in between G and B. Who is at left end?

G

In this question, 2 possibilities arises  G is either on extreme left or extreme right end but D is on immediate right of G. 

∴ G is on the extreme left.