Assertion (A) Iron is protected from corrosion by connecting magnesium metal with it. Reason (R) Iron acts as cathode and magnesium as anode which gradually disappears.

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