Which among the following halides has triagonal bipyramidal structure?

Which among the following halides has triagonal bipyramidal structure?
  1. $\mathrm{SeCl}_2$
  2. $\mathrm{SeF}_4$
  3. $\mathrm{SF}_6$
  4. $\mathrm{TeF}_6$

Asked in: MHT CET 2021 (23 Sep Shift 2)

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