Glyceraldehyde is an important intermediate in organic reactions. It can be prepared from readily available acrolein as given below. The correct statement(s) with respect to the above synthesis is(are):

Options

1. AThe oxidation of compound II to compound III can also be carried using alkaline KMnO ₄ .
2. BThe addition of HCl to acrolein is anti to Markovnikov rule.
3. CCompound I can also be prepared by reacting acrolein with HCl in Et ₂ O .
4. DThe conversion of compound I to compound II involves -elimination reaction.