Which of the following statements is correct?

  • A
    $HF$ is a stronger acid than $HCl$ in aqueous medium.
  • B
    $HClO_4$ is a weaker acid than $HClO_3$.
  • C
    $HNO_3$ is a stronger acid than $HNO_2$.
  • D
    $H_3PO_3$ is a stronger acid than $H_2SO_3$.

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