Question

It is good form to use the name of the person.

1.who are greeting
2 greeting you are
3.whom are greeting you
4.whom you are greeting​

Answer 1

Hello!

The answer here would be 4. “Whom” is used to refer to an object of a preposition or verb. Since you are addressing the person, you would use “whom” and you (the subject) are doing the greeting!

Hope this makes sense. Comment if you have any questions.

Answer 2

I feel like it’s number 4.