5) The given figure shows two infinite lines of charge having equal (in magnitude) linear charge density but with opposite sign. The electric field at any point on x axis (for x > 0) is along the unit vector .
$$\begin{gathered} \left(A\right) \cos \theta \hat{i}+\sin \theta \hat{j} \\ \left(B\right) \hat{i} \\ \left(C\right) \hat{j} \\ \left(D\right) -\sin \theta \hat{i}+\sin \theta \hat{j} \end{gathered}$$