Assertion: If a strong acid is added to a solution of potassium chromate it changes its colour from yellow to orange.
Reason: The colour change is due to the oxidation of potassium chromate.
A. If both assertion and reason are correct and reason is correct explanation for assertion.
B. If both assertion and reason are correct but reason is not correct not correct explanation for assertion.
C. If assertion is correct but reason is incorrect.
D. If both assertion and reason are incorrect.