When should you call someone by his or her first name? select all that apply.
when asked to
when that person calls you by your first name
when that person is someone of equal rank
whenever you feel like it

Explanation:

Calling someone by their first name can be a sign of great disrespect and should be avoided, except when the other person asks you to call them by their first name, or when this person is someone of equal rank (you are the same age, for example).

When a person calls you by your first name, do not want to say that you are released you call that person by the first name too, this can be considered disrespectful and inappropriate. Imagine that friend of your mother who is 60 years old calling you by her first name and you calling her by her first name, very inappropriate, do not you think?