Which phrase is appropriate to say when being introduced?

Saying "Nice to meet you" is the most appropriate response when being introduced because it conveys politeness and friendliness, which are essential components of good etiquette. This phrase expresses a positive attitude towards the interaction and acknowledges the social norms of greeting someone new. Utilizing such language helps create a welcoming atmosphere and establishes a foundation for cordial conversation.

In contrast, responses like "I have to go now" or "What do you want?" can come off as rude or dismissive, suggesting a disinterest in the interaction or the person being introduced. Similarly, asking "Who are you?" may seem confrontational and could make the other person feel uncomfortable or undervalued. Employing polite and engaging phrases like "Nice to meet you" helps foster respectful communication.