During the reduction of
to `(-CH_(2)-)` group, both the `H` atoms are supplied by the acid `(HCl)`.
i.
ii. During the reduction of
to `(-CH_(2)-)`, both the `H` atoms are supplied by the solvent `(H_(2)O)` formed by the reaction of base `(oversetset(ɵ)OH)` with `H` atoms of the hydrazone formed
iii.
iv
