JEE Math Practice Question

Let z1 and z2 be two complex numbers such that $${\overline z _1} = i{\overline z _2}$$ and $$\arg \left( {{{{z_1}} \over {{{\overline z }_2}}}} \right) = \pi $$. Then :

1. A.$$\arg {z_2} = {\pi \over 4}$$
2. B.$$\arg {z_2} = - {{3\pi } \over 4}$$
3. C.$$\arg {z_1} = {\pi \over 4}$$
4. D.$$\arg {z_1} = - {{3\pi } \over 4}$$