Which among the following represents the Schrodinger wave equation?

• A
  $\frac{d^2 \psi}{dx^2} + \frac{d^2 \psi}{dy^2} + \frac{d^2 \psi}{dz^2} + \frac{4 \pi m}{h}(E - V) \psi = 0$
• B
  $\hat{H} = \frac{h}{4 \pi^2 m} \left( \frac{d^2}{dx^2} + \frac{d^2}{dy^2} + \frac{d^2}{dz^2} \right) + V$
• C
  $\hat{H} = \frac{-h^2}{8 \pi^2 m} \left( \frac{d^2}{dx^2} + \frac{d^2}{dy^2} + \frac{d^2}{dz^2} \right) + V$
• D
  $\frac{d^2 \psi}{dx^2} + \frac{d^2 \psi}{dy^2} + \frac{d^2 \psi}{dz^2} + \frac{8 \pi^2 m}{h^2}(E - V) \psi = 0$