The energy U, stored in a capacitor of capacitance C, with charge Q and voltage V can be expressed as all of the following, except

A

$$(\frac{1}{2})QV$$

B

$$(\frac{1}{2})CV2$$

C

$$(\frac{1}{2})[\frac{Q2}{C}]$$

D

$$(\frac{1}{2})[\frac{V2}{Q}]$$