What is the correct IUPAC name of the compound?

'P' is

On combustion 0.210 g of an organic compound containing C, H and O gave 0.127 g H₂O and 0.307 g CO₂. The percentages of hydrogen and oxygen in the given organic compound respectively are:

The number of species from the following that are involved in sp³d² hybridization is :

[Co(NH₃)₆]³⁺, SF₆, [CrF₆]³⁻, [CoF₆]³⁻, [Mn(CN)₆]³⁻, and [MnCl₆]³⁻