Which among the following can form linkage isomer?
[Co(NH3)4] [Cr(C2O4)3]
[Cr(H2O)5SCN]3+
[Co(NH3)5Br]2+SO42-
K3[Fe(C2O4)3]
[Cr(H2O)5SCN]3+ can form linkage isomer, as here more than one atom of a monodentate ligand may function as a donor.