If a molecule has four hybrid sp³ orbitals, it can be concluded that the molecule has a trigonal planar molecular geometry (option A).
Molecular geometry is the specific 3-dimensional arrangement of bonded atoms.
Different compounds have different molecular geometries or spatial arrangements. The molecular geometries of atoms in compounds depend on the number of atoms or bonds attached to the central atom and lone pairs of electrons, if any, around the central atom.
Each atom and lone pair of electrons around the central atom count as one group. A trigonal planar compound has a central atom attached to three atoms arranged in a triangular shape around the central atom.
All four atoms of the trigonal planar compound lie flat on a plane. Note that there are no lone pairs of electrons around the central atom.
Therefore, option A correctly describes a molecule with four hybrid sp³ orbitals.
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