Which of the following possesses sp³d² hybridization?

[Co(NH₃)₆]Cl₃

K₃[Fe(CN)₆]

K₃[CoF₆]

None of these

sp³d² hybridization occurs in octahedral geometry.

K₃[CoF₆] has Co³⁺ (d⁶ configuration) in a high-spin state, leading to sp³d² hybridization.