$$HgCl_2 and I_2$$ both when dissolved in water containing $$I^-$$ ions the pair of species formed is

A

$$Hgl_4^{2-}, l_3^ -$$

B

$$Hg_2l_2, l^-$$

C

$$Hgl_2, l_3^-$$

D

$$Hgl_2, l^-$$