PREQ Creation for 3-Party and non 3 party items in Sales Order

Dear All,

I have a sales order with one line item with 3 party item and second line item with normal item.

Will the system create 2 separate PREQ for this- one for third party item and one for normal item or the system will create only one PREQ having two line items.

Kindly confirm me on this, as it was asked in an interview.