For a transparent medium relative permeability and permittivity, ${\mu }_r$ and ${ϵ}_r$ are $1.0$ and $1.44$ respectively. The velocity of light in this medium would be:

1. A
   $2.5\times 10^8\text{m/s}$
2. B
   $3\times 10^8\text{m/s}$
3. C
   $2.08\times 10^8\text{m/s}$
4. D
   $4.32\times 10^8\text{m/s}$