Which of the following is NOT an NCO rank?

• A. Corporal
• B. Sergeant
• C. Sergeant First Class
• D. Private

Answer: (D)

Non-commissioned officers are enlisted soldiers who hold leadership and supervisory roles, guiding and training other soldiers. The first rank that introduces those duties is the one you reach after progressing from basic competency to taking on responsibility for a small group. Corporal represents that first step into leadership, followed by Sergeant and then Sergeant First Class, with increasing levels of authority and scope of supervision.

Private, on the other hand, is an entry-level enlisted rank with no formal supervisory responsibilities. It is the starting point for enlisted soldiers and does not include leading others, which is what defines an NCO. Hence, Private is not an NCO rank.