The IUPAC name of Na2 [Ni (EDTA)] is ……………..
(a) Disodium tetra acetato nickalate (II)
(b) Sodium 2, 2′, 2″, 2″‘ – (ethane 1,2 – diyldinitrilo) tetra acetato nickelate (II)
(c) Ethylene tetra acetato nickalate (II)
(d) Sodium tetraacetato nickel (II)