Question: Suppose that a relation schema is ( a , b , c ) . Which of the following must be a super key for the

Suppose that a relation schema is (a,b,c). Which of the following must be a super key for the schema?
[c]
(b,c)
(a)
[a,b]
(b)
a,b,c
a,c
Suppose that a relation schema is (a,b,c). Which of the following

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