According to Bernoulli's equation $\frac{P}{\rho g} + h + \frac{v^2}{2g} = \text{constant}$,the terms $\frac{P}{\rho g}$,$h$,and $\frac{v^2}{2g}$ are generally called respectively:

• A
  Gravitational head,pressure head,and velocity head
• B
  Gravity,gravitational head,and velocity head
• C
  Pressure head,gravitational head,and velocity head
• D
  Gravity,pressure,and velocity head