The hydrostatic equation,

$\frac{dp}{dh}=-g$

the temperature lapse rate equation,

$T=T_0-h$

and ideal gas law,

$p=RT$

can be combined into which of the following ODE that governs the pressure variation with height.

$\frac{dp}{dh}=-\frac{p}{R(T_0-Bh)}$

$\frac{dp}{dh}=-\frac{}{R(T_0-Bh)}$

$\frac{dp}{dh}=-\frac{g}{(T_0-Bh)}$

$\frac{dp}{dh}=-\frac{pg}{R(T_0-Bh)}$