CFSE in Octahedral and Tetrahedral Complexes

Q. The crystal field splitting energy for octahedral and tetrahedral complexes is related as

1. ${\Delta }_t$ ≈ $\frac{4}{9}$${\Delta }_o$
2. ${\Delta }_o$≈ $\frac{4}{9}$${\Delta }_t$
3. ${\Delta }_t$ ≈ $\frac{1}{2}$${\Delta }_o$
4. ${\Delta }_o$ ≈ 2${\Delta }_t$

Q. In a high spin octahedral complex, the $d^7$ configuration according to CFT is

1. $t_{2g}^6,e^{1}g$
2. $t_{2g}^4,e^{3}g$
3. $t_{2g}^3,e^{4}g$
4. $t_{2g}^5,e^{2}g$