How do you account for the reducing behaviour of H 3 PO 2 on the basis of its structure?

Options

1. AH 3 PO 2 contains P-H bonds, which can release electrons, acting as reducing agents.
2. BH 3 PO 2 has a high electron affinity, allowing it to readily donate electrons.
3. CH 3 PO 2 forms stable complexes with metals, facilitating electron transfer.
4. DH 3 PO 2 undergoes a redox reaction with water, leading to the release of hydrogen gas.