Complete the following reaction

Explanation:

On heating P­₄, NaOH & H₂O it gives​ PH₃ & N_aH₂PO₂,

Hence the reaction is:

P₄ + NaOH→ PH₃ + NaH₂P0₂,

In this reaction the mole ratio of NaH₂P0₂ and PH3 = 3.

Hence the balanced chemical reaction is.

P₃ + 3NaOH + 3H₂0 → PH₃ + 3NaH₂P0₂

Final Answer: Hence, the correct answer is (B) PH₃ + NaH₂P0₂.