Which of the following expression represents the critical state of flow in non-rectangular channel?

A

$$y_o = \left(\frac{q^2}{g}\right)^{\frac{1}{3}}$$

B

$$\frac{Q^2}{g} = \frac{A^3}{T}$$

C

$$\frac{Q^3}{g} = \frac{A^2}{T}$$

D

$$\frac{Q^2}{g} = \frac{A}{T^3}$$