Seven birds A, B, C, D, E, F and G are sitting in a straight row, facing north. D sits third to the right of F, who sits at the second position from the left end. E sits between A and F. G sits to the left of F. B sits in the second position from the right end. Which of the following statements is true?

D sits third to the right of F, who sits at the second position from the left end.

(end) _ F _ _ D _ _ (end)

G sits to the left of F.

(end) G F _ _ D _ _ (end)

B sits in the second position from the right end.

(end) G F _ _ D B _ (end)

E sits between A and F.

(end) G F E A D B _ (end)

Now only 'C' is remaining which can be placed on the blank space.

(end) G F E A D B C (end)

Option (a) B sits exactly between D and A.

The given statement is not true.

Option (b) C sits at extreme right end.

The given statement is true.
Option (c) F sits at extreme left end.

The given statement is not true.
Option (d) E sits to the immediate left of D.

The given statement is not true.

hence option (b) is the correct answer.