A physician has a duty to see to the health and best medical interests of the patient.
Conclusion (should)
When the duty to see to the patient's health / medical interests conflicts with the right of the patient to be fully informed about their health, the latter should prevail.
Evidence (since)
The patient's right to be fully informed is a basic right.
If we didn't make that right prevail, we would risk treating the patient as an object not a person.
Evaluate
We're trying to guarantee the idea that in a head-to-head fight, patient's right to be informed should beat out physician's duty to see to patient's best medical interests.
We have two ideas we can use. The patient's right is a basic right, and if we usurped it we would risk treating the patient as a mere object, not a person.
Goal
So there are two potential correct answers:
If it's a basic right, then it beats our a physician's duty.
We should never do anything that carries the risk of treating the patient as mere object, not a person.