Three allotropes $(A)$,$(B)$ and $(C)$ of phosphorus in the following change are respectively
$A \xrightarrow[1200 \ atm]{470 \ K} B$
$A \xrightarrow[CO_2 - atm]{570 \ K} C$

  • A
    white,black,red
  • B
    black,white,red
  • C
    red,black,white
  • D
    red,violet,black

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