The tblProductDetails table is shown in the image below. Which field would be the most appropriate choice for a Primary Key?

$\backslash$table$[[$Field Name,Data Type,$],[$ProductiD$,$Number,$],[$Product Name,Short Text,Unique product ID$],[$Order Number,Number,Name of product$],[$Date of Manufacturing,Date$/$Time$,$Order Number$],[$Date of Delivery,Date$/$Time$,$Product's date of manufacturing$],[$Port$,$Short Text,Product's date of delivery$]]$

Date of Delivery

Product Name

Product ID

Order Number