An organic compound A on treatment with `CHCl_3` and KOH gives two compounds `B` and `C`. Both `B` an `C` give the same product `(D)`when distilled with zinc dust. Oxidation of `D` gives `E`. having molecular formula `C_7 H_6 O_2`. The sodium salt of `E` on heating with soda lime gives `F` which may also be obtained by distilling `A` with zinc dust. Identify `A` to `F`,

Explanation

(A) on treatment with `CHCl`, and `KOH` (Réimer Tieman reaction) giyes, two product `B` and `C`.
hydroxy.benzaldehyde and `p` - hydroxy benzaldelyđe respectively. Since both `B` and `C` on distillation with zinc dust.