Two parallel infinite line charges with linear charge densities$\lambda +\frac{C}{m} \;and \;-\lambda \frac{C}{m}$ are placed at a distance of 2R in free space. What is the electric field midway between two line charges?

Question

( A ) $\frac{2\lambda}{2\pi\varepsilon_0R^\frac{N}{C}}$
( B ) $\frac{2\lambda}{\pi\varepsilon_0R^\frac{N}{C}}$
( C ) $\frac{\lambda}{\pi\varepsilon_0R^\frac{N}{C}}$
( D ) zero