- The correct answer is Veracity because it refers to the ethical obligation to be truthful and honest with patients. Advertising "completely painless procedures" without a guarantee is misleading and deceptive, violating the dentist’s duty to provide accurate information.
- This breaches the patient’s right to make informed decisions based on reliable and truthful claims.
- Hence, it undermines trust and professional integrity.

Reference: Beauchamp & Childress, Principles of Biomedical Ethics, 8th Ed., Chapter 4: Veracity (p. 97-99)