Dear Ajitabh,
Yes. It is a Sub-Contracting PO.
Having selected Item Category as 'L' (Sub Contracting), then the buttons 'Explode BOM', 'Components' will be shown in 'Material Data' tab.
Now, when we click on the 'Explode BOM' button, the multiple BOM that are available for Material Number should be shown and the user should be able to select one among them.
Regards,
Shankar