Choose the wrong statement    
a) work done in moving a charge on equipotential surface is zero
b) electric lines of force are always normal to equipotential surface
c) when two opposite charges are brought nearer, then electrostatic potential energy  of the system increases
d) electric lines of force diverge at positive charge and converge towards negative charge
 

• A

  a

• B

  b

• C

  c

• D

  d