NEET UG PHYSICS MCQ: UNITS & MEASUREMENTS

The quantities $x = \frac{1}{{\sqrt {{\mu _0}{\varepsilon _0}} }},\,\,y = \frac{E}{B}$ and $z = \frac{l}{{CR}}$ are defined, where $C$ is capacitance, $R$ is resistance, $l$ is length, $E$ is electric field, $B$ is magnetic field, ${\varepsilon _0}$ is free space permittivity and ${\mu _0}$ is permeability, respectively. Then,