Which of the Following Statements Is Incorrect

Multiple Choice

Which of the following statements is incorrect?

A) Capacitance is always positive.
B) The symbol for potential difference between the plates of a capacitor is .
C) Water is a polar molecule.
D) When a dielectric is placed in a capacitor it serves to reduce the electric field.
E) Nonpolar molecules cannot be used for dielectric material in a capacitor.