Which acronym expands to First Officer?

• A. Flight Attendant
• B. Federal Aviation Administration
• C. First Officer
• D. Federal Aviation Regulation

Answer: (C)

In aviation, FO stands for First Officer, the flight deck co-pilot who assists the Captain and can take control when needed. The option that names the role itself—First Officer—is the correct choice because it is the expansion of the commonly used acronym for the second-in-command in the cockpit. The other options refer to a Flight Attendant (often abbreviated FA), the Federal Aviation Administration (FAA), and Federal Aviation Regulation (typically FAR); none of these denote the co-pilot role. The First Officer shares flight duties, monitors instruments, handles communications, and operates under the Captain’s lead, stepping in as pilot in command if required.