(c) According to the Berboulli’s theorem the total energy (pressure energy, potential energy and kinetic energy ) of an incompressible and non viscous fluid in steady flow through a pipe remains constant throughout the flow.
$ie,\ \ \ \ \ p + \rho gh + \frac{1}{2}{\rho v}^{2} = constant.$
So, it is clear that Bernouli’s theorem is a consequence of the law of conservation of energy.