Which of these crystal-field splitting diagrams represents:

a. a weak-field octahedral complex of  Fe³⁺ ,

b. a strong-field octahedral complex of Fe³⁺ 

c. a tetrahedral complex of  Fe³⁺

d. a tetrahedral complex of Ni²⁺ (The diagrams do not indicate the relative magnitudes of ∆. ) [Find more in Section 23.6.]

<IMAGE> <IMAGE> <IMAGE> <IMAGE>