The person entering the room should say Good Morning first. I never say it to the person rude enough to walk in without greeting the people who are already in.
good morning
Buenos días.
* You can say good morning to anyone you please and it's a pleasant salutation and that would be up to just before 12:00 Noon.
A brief greeting. Such as... Good morning. Good morning, I hope everyone is doing well today.
To say good morning in Dhivehi, you have to say "goedemorgen".
good morning
Good morning.
good morning
good morning
good morning
Good morning