GATE Civil Engineering (CE) 2015 Shift 1 Solved Paper

In a two-dimensional steady flow field, in a certain region of the x-y plane, the velocity component in the x-direction is given by   ${\mathit{v}}_{\mathit{x}}={\mathit{x}}^2$and the density varies as $\mathit{\rho }=\frac{1}{\mathit{x}}$  Which of the following is a valid expression for the velocity component in the y-direction, v_y?