Among the following pairs of complexes,in which case is the $\Delta_0$ value higher for the first one?

Crystal field splitting energies for octahedral $(\Delta_0)$ and tetrahedral $(\Delta_t)$ geometries caused by the same ligands are related through the expression

Given below are two statements: Statement $I$: Each electron in $e_g$ orbitals destabilizes the orbitals by $+0.6\Delta_o$ and each electron in the $t_{2g}$ orbitals stabilizes the orbitals by $-0.4\Delta_o$ in an octahedral field on the basis of crystal field theory. Statement $II$: All the $d$-orbitals of the transition metals have the same energy in their free atomic state but when a complex is formed the ligands destroy the degeneracy of these orbitals on the basis of crystal field theory. In the light of the above statements, choose the correct answer from the options given below:

The order of energy absorbed,which is responsible for the color of the following complexes,is:

In tetrahedral coordination complexes,what is the order of energy levels of $d$-orbitals during crystal field splitting?

Which of the following is a weak field ligand?