Step 1: Understanding XeF₄ structure.
Xenon tetrafluoride (XeF₄) has a square planar structure. This is because of the central xenon atom surrounded by four fluorine atoms with lone pairs of electrons on xenon. The lone pairs occupy the axial positions, resulting in a square planar geometry for the bonding pairs.
Step 2: Conclusion.
The correct answer is (C) because XeF₄ adopts a square planar geometry.