Final answer:
In cases of sexual misconduct, if a registrant learns about the misconduct from a patient of another healthcare practitioner, they must report the misconduct immediately without seeking consent.
Step-by-step explanation:
In the case of sexual misconduct, if a registrant learns about the misconduct from a patient of another healthcare practitioner, they must report the misconduct immediately without seeking consent (Option B). The patient's privacy rights are important, but in cases involving sexual misconduct, the potential risk of harm to the sexual partner outweighs the patient's privacy rights. This is especially true when there is a risk of transmitting sexually transmitted diseases (STDs).