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Among the following correct statement is...

Among the following correct statement is/are
A) Due to the presence of empty 3d-orbitals at phosphorus , it can be pentahydride.
B) Due to the lack d-orbitals in the valance shell of nitrogen, it can't form pentaoxide.
C) stability order of pentahalides is `PCl_5`>`ArCl_2`<`SbCl_2`
D) In the solid `PBr_2`, hybridisation of phosphorous is `sp_3` and `sp_3d`

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