Assertion : Acidified K2Cr2O7 solution becomes green when SO2 gas is passed through it.
Reason : This is an redox reaction.
(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 correct explanation of Assertion
(C) Assertion is true but Reason is false
(D) Assertion is false but Reason is true