Consider the following ER diagram :
“borrower” mapping cardinality is many-to-many. While converting the ER diagram into a relational DBMS model, the relationship set “borrower” is converted into a relation
borrower(cust_id, loan_id, access_date)
, what is the primary key of “borrower”?
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cust_id
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loan_id
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(cust_id, loan_id)
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(cust_id, loan_id, access_date)