Answer:
- ¿Quién es usted?
- Yo soy Luis.
Explanation:
In English this means:
- Who are you?
- I'm Luis.
Option number 2 means "My name is Luis", which is not what he's being asked.
Option number 3 means "Luis is writing to me", which makes no sense in the context of the conversation.
Option number 4 means: "They call me Luis", which in some what could be correct but it's not really answering the question. The best option, the only one 100% correct, is option number 1.
