Final answer:
The X-ray would be owned by Dr. Smith's office.
Step-by-step explanation:
The X-ray in question will be owned by Dr. Smith's office. When a patient undergoes an X-ray, the resultant images and records are typically owned by the healthcare provider or facility where the procedure was conducted. In this case, since John had his X-ray performed by Dr. Smith, it would be Dr. Smith's office that owns the X-ray.