Assertion: Sulfur is oxidized by $H_2O_2$ in the presence of $Fe(III)$.
Reason: $Fe(III)$ catalyzes the oxidation of sulfur to sulfate.

• A
  Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
• B
  Both Assertion and Reason are true,but Reason is not the correct explanation of Assertion.
• C
  Assertion is true,but Reason is false.
• D
  Both Assertion and Reason are false.