A liquid flows through a horizontal tube. The velocities of the liquid in the two sections, which have areas of cross-section \[{{A}_{1}}\] and \[{{A}_{2}}\], are \[{{v}_{1}}\] and \[{{v}_{2}}\] respectively. The difference in the levels of the liquid in the two vertical tubes is h

• A.             The volume of the liquid flowing through the tube in unit time is \[{{A}_{1}}{{v}_{1}}\]
• B.             \[{{v}_{2}}-{{v}_{1}}=\sqrt{2gh}\]
• C.             \[v_{2}^{2}-v_{1}^{2}=2gh\]
• D.              The energy per unit mass of the liquid is the same in both sections of the tube