Consider that d6 metal ion (M2+) forms a complex with aqua ligands, and the spin only magnetic moment of the complex is 4.90 BM. The geometry and the crystal field stabilization energy of the complex is :
(1) tetrahedral and –1.6$\Delta$t + 1P
(2) octahedral and –2.4$\Delta$0 + 2P
(3) tetrahedral and –0.6$\Delta$t
(4) octahedral and –1.6$\Delta$0