If z is a complex number of unit modulus and argument $\theta$, then $arg\bigg(\large\frac{1+z}{1+\bar{z}}\bigg)$ equals

Question

$\begin{array}{1 1} (1)-\theta \\ (2) \large\frac{\pi}{2} -\theta \\ (3) \theta \\ (4) \pi -\theta \end {array}$