Answer:
Its 3) Mi nombre
Explanation:
Me llamo is the only other option that goes into this sentence and it is not that one because it is equivalent to someone saying "I call myself, __". While Mi Nombre is the direct equivalent to "My name is" which fits into this dialogue.
Perhaps I’d need more context, but I think the missing word would be something along the lines of les or something. I’m new to Spanish, sorry.
Can you please post the audio?
