$POCl_3$ is prepared by the reaction of:
$(I)$ $P_4 + SO_2Cl_2 \to$
$(II)$ $P_4 + SOCl_2 \to$
$(III)$ $PCl_5 + SO_2 \to$
$(IV)$ $PCl_5 + C_2H_5OH \to$

  • A
    $I$ & $III$
  • B
    $II$ & $III$
  • C
    $I$ & $IV$
  • D
    $III$ & $IV$

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