From the earlier deductions:
- $D<F$ (from B’s statement: “D will be as old as F was...”)
- $F<G$ (from A’s remark: “You may be older than F but G is as old as I was...”).
- $G<A$ but $G>F$.
- $B<C$ and $C<E$, but no direct evidence that B is younger than D.
If we compare:
$D<F<G<A$ and also $B<C<E$.
Now, comparing the two chains, the youngest is $D$, because all other members are placed above him in age order.
\(\boxed{\text{Correct Answer: (B) D}}\)