Assertion (A) : Σ_all delta S^ B.delta S = 0 Reason (R) : Magnetic mo…

Both (A) and (R) are true and (R) is the correct explanation of (A).

Both (A) and (R) are true but(R) is NOT the correct explanation of (A).

(A) is true but (R) is false.

Both (A) and (R) are false.