Out of $TiF_6^{2-}$and $CoF_6^{3-}$ , $Cu_2Cl_2$ and $NiCl_4^{2-}$ (Z of Ti = 22, Co = 27, Cu = 29, Ni = 28) the colourless species are : -

Question

( A ) $TiFe_6^{2-} and Cu_2Cl_2$
( B ) $Cu_2Cl_2 and NiCl_4^{2-}$
( C ) $CoF_6^{3-} and NiCl_4^{3-}$
( D ) $TiFe_6^{2-} and CoF_6^{3-}$