Question

Which of the following questions would you not typically use when greeting your best friend?

¿Cómo estás?
¿Cómo te va?
¿Qué pasa?
¿Cómo está usted?

Answer 1

I would use ¿Como estas?

Answer 2

¿Qué pasa? it's not bad to ask but it's mainly used to say what's going on when your friend looks sad.