Match the quantity in List I with the expression in List II. List I: (A) peak emf of a generator, (B) time constant of an LR circuit, (C) energy stored in an inductor, (D) emf of a moving rod. List II: (1) $Blv$, (2) $\tfrac{1}{2}LI^2$, (3) $NBA\omega$, (4) $L/R$.