Which of the above are correct?

Question

Bernoulli’s equation $\frac{p}{\rho } + \frac{v^{2}}{2} + gZ = constant$ is valid for

     1.  Steady flow          2. Viscous flow

     3.  Incompressible flow

     4.  Flow along a streamline

     Which of the above are correct?

(a) 1, 2 and 3 (b) 1, 2 and 4

 (c) 1, 3 and 4        (d) 2, 3 and 4