The discharge through fully submerged orifice is - Where,H = Difference in level of waterH1 = Height of water above the top of the orifice on the upstream sideH2 = Height of water above the bottom of the orifice

• A. \({c_d} \times b \times \left( {{H_2} - {H_1}} \right) \times \sqrt {2gH} \)
• B. \({c_d} \times b \times \left( {\;H_2^{\frac{3}{2}} - H_1^{\frac{3}{2}}} \right) \times \sqrt {2gH} \)
• C. None of these
• D. \({c_d} \times b \times \left( {\;{H_2} - {H_1}} \right) \times \sqrt {2g} \times {H^{\frac{3}{2}}}\)