SAP Re-install

Hi Experts,

We are having Test system , We have removed SAP application alone from that system.DB is still existing in that server.If I goto install SAP application in that sever by using the same DB(Existing one) Which option need  to select while run "SAPINST" either " SAP application server ABAP  or System Copy--> based on ABAP"?

Thanks in advance

Regards,

Dheen AJ