The discharge over a rectangular notch is (where b = Width of notch and H = Height of liquid, above the sill of the notch)

A. $$\frac{2}{3}{{\text{C}}_{\text{d}}} \times {\text{b}}\sqrt {2{\text{gH}}} $$

B. $$\frac{2}{3}{{\text{C}}_{\text{d}}} \times {\text{b}}\sqrt {2{\text{g}}} \times {\text{H}}$$

C. $$\frac{2}{3}{{\text{C}}_{\text{d}}} \times {\text{b}}\sqrt {2{\text{g}}} \times {{\text{H}}^{\frac{3}{2}}}$$

D. $$\frac{2}{3}{{\text{C}}_{\text{d}}} \times {\text{b}}\sqrt {2{\text{g}}} \times {{\text{H}}^2}$$

Answer: Option C