Final answer:
The correct response is "Me llamo Marcos. ¿Y tú?"
Step-by-step explanation:
The correct response to the question "Hola. ¿Cómo te llamas?" is "Me llamo Marcos. ¿Y tú?". This means "My name is Marcos. And you?". It is the appropriate way to introduce yourself in Spanish, as it answers the question and also shows interest in knowing the other person's name.
Learn more about Greetings in Spanish