(A) An electrochemical cell can be set-up only if the redox reaction is spontaneous.
(R) A reaction is spontaneous if free energy change is negative.
A. If both (A) and (R) are correct, and (R) is the correct explanation of (A).
B. If both (A) and (R) are correct, but (R) is not the correct explanation of (A).
C. If (A) is correct, but (R) is incorrect
D. If (A) is incorrect, but (R) is correct.
