Among seven persons A, B, C, D, E, F and G, who are of different ages, D is younger than only A and E. E is younger to A and older than B. C is third youngest. F and G are second youngest and youngest respectively. Who is the fourth eldest?

B

A, B, C, D, F and G

1) C is third youngest

2) F and G are second youngest

So, _>_>_>_>C> F> G

3) E is younger to A and oldest than B

4) D is younger than only A and E

A> E> D> B

So, the actual order is;

A> E> D> B> C> F> G

Therefore, B is the fourth eldest