German phrase
Welches ~ ist erforderlich?
Meaning
Which ___ is required?
When to use it
Asks which item is required. Common in official applications and procedures.
Example dialogue
WelchesVisumist erforderlich?
Which visa is required?
Für Studienaufenthalte ist in der Regel ein Studentenvisum erforderlich.
For study stays, a student visa is generally required.