The speed $v$ of sound in a gas is described by $v = \sqrt{\frac{\gamma P}{\rho}}$, where $P$ represents the gas pressure, $\rho$ represents its density, and $\gamma$ is a constant. What are the SI base units of $\gamma$?
- A$\text{m}^{-1}\,\text{s}$
- B$\text{m}^3\,\text{s}^{-3}$
- C$\text{m}^{-4}\,\text{s}^4$
- Dno units