Which of the Following Shows the Overall Equation for the Light

Which of the following shows the overall equation for the light reactions?

A) 2 H₂O + 1 NADP⁺ $\rarr$ 1 H⁺ + O₂ + 1 NADPH, requires 4 photons
B) 2 H₂O + 1 NADP⁺ $\rarr$ 1 H⁺ + O₂ + 1 NADPH, requires 8 photons
C) 2 H₂O + 2 NADP⁺ $\rarr$ 2 H⁺ + O₂ + 2 NADPH, requires 4 photons
D) 2 H₂O + 2 NADP⁺ $\rarr$ 2 H⁺ + O₂ + 2 NADPH, requires 8 photons
E) 2 H₂O + 2 NADP⁺ $\rarr$ 2 H⁺ + O₂ + 2 NADPH, requires 16 photons