Seven boys A, B, C, D, E, F and G sit in a row facing the north. A sits second to the left of B. A is sitting at extreme left end. C sits exactly in the middle of the row. D sits third to the right of E. F is not sitting at any extreme end. Who is immediate right of F?

G

A sits second to the left of B. A is sitting at the extreme left end. C sits exactly in the middle of the row.

A    _    B    C    _    _    _

D sits third to the right of E.

A    E    B    C    D    _    _

F is not sitting at an end.

So, G is sitting at the extreme right end.

A    E     B    C    D    F    G

So, G is the immediate right of F.