What is '$A$' in the following reaction?
$2Fe^{3+} + Sn^{2+} \to 2Fe^{2+} + A$

  • A
    $Sn^{3+}_{(aq)}$
  • B
    $Sn^{4+}_{(aq)}$
  • C
    $Sn^{2+}_{(aq)}$
  • D
    $Sn_{(s)}$

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