The physical quantity that has no dimensions

The quantities $\quad x=\frac{1}{\sqrt{\mu_{0} \epsilon_{0}}}, y=\frac{E}{B}$ and $z=\frac{l}{C R}$ are defined where $C-$ capacitance $R-$Resistance, $l-$length, $E-$Electric field, $B-$magnetic field and $\varepsilon_{0}, \mu_{0},$ -free space permittivity and permeability respectively. Then....

Select the pair whose dimensions are same

The dimensions of $\left(\frac{ B ^{2}}{\mu_{0}}\right)$ will be.
(if $\mu_{0}$ : permeability of free space and $B$ : magnetic field)

Match List $I$ with List $II$

LIST$-I$	LIST$-II$
$(A)$  Torque	$(I)$    $ML ^{-2} T ^{-2}$
$(B)$   Stress	$(II)$   $ML ^2 T ^{-2}$
$(C)$   Pressure of gradient	$(III)$   $ML ^{-1} T ^{-1}$
$(D)$   Coefficient of viscosity	$(IV)$   $ML ^{-1} T ^{-2}$

Choose the correct answer from the options given below

Which pair do not have equal dimensions?