It would be the first one!
You cannot put any sort of endmark (period, question mark, or exclamation point) here because it is not a complete sentence. Complete sentences must have a subject and a predicate. You can tell there's not even a verb here, so this is just a fragment, and we would have to use a comma.
a. Very truly yours,
Answer:
true, but there is certain criteria that has to go along with it.
I’m so confused are u okay what the hell is this
