In the equation $\bigg( \large\frac{1}{P \beta} \bigg)= \large\frac{y}{k_BT}$, where P is the pressure, y is the distance, $k_B$ is Boltzmann constant and T is the temperature. Dimensions of $\beta$ are

Question

$\begin {array} {1 1} (1)\;M^{-1}L^1T^2 & \quad (2)\;M^0L^2T^0 \\ (3)\;M^1L^{-1}T^{-2} & \quad (4)\;M^0L^0T^0 \end {array}$