Two parallel infinite line charges with linear charge densities `+lambda C//m` and `-lambda` C/m are placed at a distance of 2R in free space. What is the electric field mid-way between the two line charges?
A. zero
B. `(2 lambda)/(pi epsi_(0)R)`
C. `(lambda)/(pi epsi_(0)R)`
D. `(1)/(2 pi epsi_(0)R)`