The correct option is D MnO−4
(A) [Cu(PPh3)4]+→Tetrahedral PPh3 is a strong field ligand.d10 configuration, it is colorless(B) [Zn(H2O)6]2+→Octahedral complex(C) [Cu(NH3)4]SO4→Square plannar ; It is due to the transfer of one lectron from 3d orbital to higher orbital resulting dsp2 hybridization. So, the structure is square plannar. (D) MnO−4→d3S,Tetrahedral complex; purple coloured due to LMCT