1.

Consider a relational table with a single record for each registered student with the following attributes:

A. Bank Account_Number is a candidate key
B. Registration Account_Number can be primary key
C. UID is a candidate key if all students are from the same country
D. If S is a superkey such that S UID is NULL then S UID is also a super key
Answer» B. Registration Account_Number can be primary key


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