The suspect (a person thought to be guilty of a crime) appears before a magistrate court judge to have the charges brought against them explained and to determine if they are to be released on bail (the temporary release of a prisoner in exchange for security given for the prisoner's appearance at a later hearing).

Preliminary hearing
Arrest
Initial appearance
Arraignment
Plea bargaining
Booking
Grand jury indictment

Pretrial hearing

so which option above is it

The correct option above is "Initial appearance."