← GATE CSE 2016 Set 1

Q21

MCQ1 mark, −0.33

Which of the following is NOT a superkey in a relational schema with attributes $V,W,X,Y,Z$ and primary key $V\;Y$ ?

(A)

$VXYZ$

(B)

$VWXZ$

(C)

$VWXY$

(D)

$VWXYZ$

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