Commander
Commodore
Brigadier
Admiral
Answer is Wrong!
Answer is Right!
The answer is C. Brigadier.
A commander is a military officer who is in charge of a group of soldiers. A commodore is a naval officer who is in charge of a small fleet of ships. An admiral is a naval officer who is in charge of a large fleet of ships. A brigadier is a military officer who is in charge of a brigade, which is a unit of about 3,000 soldiers.
Brigadier is the only word that does not refer to a naval officer.