Bro officer ranks are only available to those who have graduation degree . If you don't know about any topic you should try not to indulge into it. Also I don't intend to be rude but next time,keep this in mind because some teenagers wholly depend upon the information that we provide here. We should better stay quiet that saying something wrong.
Thanks for your time. :)

Hello Tiksha

Before saying anything go to Google and search or ask from someone who has the knowledge of all this .
Because in technical entry they will teach us and we complete our graduation there and get the lieutenant rank.
Don't say anything without proper information.
Good day.