A two point charges 4q and -q are fixed on the x - axis `x=-d/2 and x = d/2` , respectively. If a third point charge 'q' is taken from the origin to x = d along the semicircle as shown in the figure, the energy of the charge will

Options

A. increase by `(2q^2)/(3piepsilon_0d)`
B. decrease by `(4q^2)/(3piepsilon_0d)`
C. increase by `(3q^2)/(4piepsilon_0d)`
D. decrease by `(q^2)/(4piepsilon_0d)`

Answer

C