List of top Atmospheric and Ocean Science Questions on Equations for Conservation of Mass, Momentum, Heat and Salt asked in GATE XE

Which of the following is the correct form of the mass divergence form of the continuity equation for a compressible fluid? 
[In the given equations, \(\rho\) is the density and \(\mathbf{V}\) the three-dimensional velocity vector of the fluid.] 
(i) \(\dfrac{\partial \rho}{\partial t} + \nabla \times (\rho \mathbf{V}) = 0\) 
(ii) \(\dfrac{\partial \rho}{\partial t} + \nabla \cdot (\rho \mathbf{V}) = 0\) 
(iii) \(\dfrac{\partial \mathbf{v}}{\partial t} + \rho \, \nabla \cdot \mathbf{v} = 0\) 
(iv) \(\dfrac{\partial \rho}{\partial t} + \mathbf{v} \cdot \nabla \rho = 0\)