For an infinite line of charge having linear charge density `lambda` lying along x-axis the work done in moving a charge `q` form `C` to `A` along `CA` is
A. `(q lambda)/(pi epsi_(0)) log_(e) sqrt(2)`
B. `(q lambda)/(4pi epsi_(0)) log_(e) sqrt(2)`
C. `(q lambda)/(4pi epsi_(0)) log_(e) 2`
D. `(q lambda)/(2 pi epsi_(0)) "log"_(e) 1/2`