Which one of the following gives the highest volume of $O_2$ at $STP$ on complete decomposition?

  • A
    $2 \text{ mL}$ of $100 \text{ V } H_2O_2$
  • B
    $500 \text{ mL}$ of $30 \text{ V } H_2O_2$
  • C
    $1 \text{ L}$ of $10 \text{ V } H_2O_2$
  • D
    $100 \text{ mL}$ of $20 \text{ V } H_2O_2$

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