Assertion : Methanoic acid reduces mercuric chloride to mercurous chloride on heating while ethanoic acid does not
Reason : Methanoic acid is a stronger acid than ethanoic acid
A. Both A and R are true is the correct explanation of A
B. Both A and R are true but R is not a correct explanation of A
C. A is true but R is false
D. A is false but R is true