Consider the following remarks pertaining to the irrotational flow:
1. The Laplace equation of stream function $\frac{\partial ^{2}\Psi }{\partial x^{2}} + \frac{\partial ^{2}\Psi }{\partial y^{2}} = 0$, must be satisfied for the flow to be potential.
2. The Laplace equation for the velocity potential $\frac{\partial ^{2}\phi }{\partial x^{2}} + \frac{\partial ^{2}\phi }{\partial y^{2}} = 0$, must be satisfied to fufill the criterion of mass conservation i.e. continuity equation.
Which of the above statements is/are correct?
(a) 1 only (b) Both 1 and 2
(c) 2 only (d) Neither 1 nor 2