Assertion(A) : Decrease of free energy during the process under particular conditions provides a measure of its spontaneity.
Reason(R ) : A spontaneous change must have +ve sign of `DeltaS_("total")`.
A. Both `A`and `R` are true and `R` is the correct explantion of `A`
B. Both `A`and `R` are true and `R` is not a correct explantion of `A`
C. `A` is true but `R` is false
D. `A` is false but `R` is true