Which of the following is the primary key of the ORDER_LINE (ORDER_NUM,ITEM_NUM,NUM_ORDERED,QUOTED_PRICE)table? A)ORDER_NUM B)ITEM_NUM C) QUOTED_PRICE D)ORDER_NUM and ITEM_NUM

Question

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The primary key of a table is a unique identifier for each record. In the ORDER_LINE table, both ORDER_NUM and ITEM_NUM together uniquely identify each record, as a single order can have multiple items.

Which of the Following Is the Primary Key of the ORDER_LINE