In the following molecule,

Hybridisation of Carbon a, b and c respectively are:

The hybridization of P exhibited in PF₅ is sp^xd^y. The value of y is_________

Number of lone pair(s) of electrons on central atom and the shape of BrF₃ molecule respectively.

Total number of species in which atleast one atom have same hybridization as in central atom of azide ion.

N₂O, C₂H₂, CO₂, C₃O₂, BeF₂, NO₂, PF₃

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: During the boiling of water having temporary hardness, Mg(HCO?)? is converted to MgCO?.
Reason R: The solubility product of Mg(OH)? is greater than that of MgCO?. In the light of the above statements, choose the most appropriate answer from the options given below:
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The reaction in which hybridization of the underlined atom is affected is: