<span>Me duele la cabeza.
This means I have a headache.
The reason for this is because it is an I statement and the other that isn't a question is a you statement which isn't explaining how you feel.
Hope this helps!</span>
Igualmente because If u translate it “mucho gusto” is basically “nice to meet you” and “igualmente” means “you too” or in this case “nice to meet you too” which makes sense.