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Question:

In the chemical reactions given above $\mathrm{A}$ and $\mathrm{B}$ respectively are :

  1. $\mathrm{H}_{3} \mathrm{PO}_{2}$ and $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{Cl}$

  2. $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}$ and $\mathrm{H}_{3} \mathrm{PO}_{2}$

  3. $\mathrm{H}_{3} \mathrm{PO}_{2}$ and $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}$

  4. $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{Cl}$ and $\mathrm{H}_{3} \mathrm{PO}_{2}$


Correct Option: 1

Solution:

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