21. What is the bond order and magnetism for Rh₂(μ-CH₃COO)₄Cl₂:
(A) 3 bonds, paramagnetism
(B) 2.5 bonds, paramagnetism
(C)3 bonds, diamagnetism
(D) 1.5 bonds, paramagnetism
(E) 2 bonds, paramagnetism

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