An oil drop of radius r and density r is held stationary in a uniform vertically upwards electric field 'E'. If `p_(0)=(ltp)` is the density of air and e is quanta of charge, then the drop has–

Options

A. `(4pir^(3)(p-p_(0)))/(3eE)` excess electrons
B. `(4pir^(2)(p-p_(0)))/(eE)`excess electrons
C. deficiency of `(4pir^(3)(p-p_(0))g)/(3eE)` electrons
D. deficiency of `(4pir^(2)(p-p_(0))g)/(eE)`electrons