White phosphorus on reaction with concentrated

Question:

White phosphorus on reaction with concentrated $\mathrm{NaOH}$ solution in an inert atmosphere of $\mathrm{CO}_{2}$ gives phosphine and compound $(X) .(X)$ on acidification with $\mathrm{HCl}$ gives compound $(Y)$. The basicity of compound $(Y)$ is:

  1. 2

  2. 1

  3. 4

  4. 3


Correct Option: , 2

Solution:

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