Answer:
sp3d
Explanation:
The Central atom Y is singly bonded to 3 X substituents and it has two lone pairs.
An example of compound that fits this description is BrF3.
The central atom used d orbitals for hybridization.
The 2 lone pair plus three single bond equals 5.
As the hybridization value is equal to 5 it gives rise to sp3d hybrid orbitals.