Among the species given below, the spin-only magnetic moment is highest for (Given: Atomic number of Ti = 22, Mn = 25, Fe = 26 and Co = 27)

1. A. [Mn(CN)6] 3-
2. B. [Fe(CN)6] 3-
3. C. [Co(NH3)6] 3+
4. D. [Ti(H2O)6] 3+

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