Final Answer:
A molecule containing a central atom with sp3d hybridization has a trigonal bipyramidal electron geometry (Option E).
Step-by-step explanation:
In sp3d hybridization, the central atom forms five hybrid orbitals by combining one s orbital, three p orbitals, and one d orbital. These hybrid orbitals arrange themselves in a trigonal bipyramidal geometry around the central atom. The term "trigonal bipyramidal" indicates that there are three atoms in the equatorial plane and two atoms along the axial positions. This arrangement is consistent with sp3d hybridization, which involves five electron regions around the central atom. Options A (seesaw), B (bent), C (octahedral), and D (trigonal planar) do not accurately represent the electron geometry of a molecule with sp3d hybridization.
Option E is the answer.