Which of the following is an example of a licensed nurse?

A registered nurse is an example of a licensed nurse because they have completed the necessary education, which typically includes obtaining an Associate's or Bachelor's degree in nursing, and have passed a licensure exam, commonly the NCLEX-RN. This licensure is essential as it signifies that the nurse has met the professional standards required to provide nursing care and is legally able to practice as a nurse.

In contrast, a certified nursing assistant, medical assistant, and health information technician perform important healthcare roles but do not hold the same level of licensure. Certified nursing assistants support nurses and assist patients with basic care tasks, while medical assistants perform administrative and clinical tasks under the supervision of physicians. Health information technicians manage patient data and health records, focusing more on information management rather than direct patient care. Each of these roles plays an essential part in the healthcare system but does not carry the same licensure and professional responsibilities as a registered nurse.